推荐-流利说-懂你英语-Level3-Unit3

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1、Level3 Unit3 Part1 Listening - Life & Conditions 1There are many forms of life on Earth, including human beings.Life exists in a variety of conditions.Some forms of life live in a watery environment, like the oceans.Other forms of life can be found in very dry areas like deserts.However, for any for

2、m of life to exist, conditions must be right.When conditions are not right, that form of life will become extinct.To become extinct means to die out completely.Conditions must be right for life to exist.Millions of years ago there were forms of life that no longer exist.When conditions changed, thes

3、e forms of life died out.One extinction event happened about 250 million years ago.This was the largest extinction event of all time.Many forms of life became extinct.96% of all life in the oceans died out.Most insects also became extinct.This event happened over a period of several million years.Th

4、e causes of this extinction event are still unknown.Possible causes include large volcanic eruptions and global warming.Some scientists believe that there were several causes.They believe that a series of events caused the extinctions.Scientists are working to better understand what really happened.

5、推荐精选Level3 Unit3 Part1 Listening - Life & Conditions 2In modern times we humans face changing conditions.For humans to live, we need clean air and clean water.Pollution is now a growing problem around the world.Pollution poisons the air and water that we depend on.Polluted air makes people sick and

6、afraid to go outside.Polluted water poisons our food supply.As a result, we never know which foods are safe to eat.Human beings cannot live in a poisoned environment.Therefore, pollution is a major threat to our existence.Humans need temperatures to be in a comfortable range.To be in a comfortable r

7、ange means to be neither too hot nor too cold.With global warming, global temperatures are rising.As temperatures rise, the polar icecaps will melt.As the polar icecaps melt, ocean levels will rise.Areas of some countries will soon be under water.People will be forced to relocate from flooded areas.

8、In nature, even small changes can sometimes have large effects.Its difficult to predict whats going to happen.The entire ecosystem that we depend on is changing.Some of these changes are irreversible.推荐精选Irreversible changes cannot be undone.Lets hope that humans are smart enough to understand how t

9、he world is changing.With more understanding, we can make better choices about what to do.We can face the challenges of pollution and global warming.We need to do this before its too late.This planet Earth is our only home and we need to protect it.Level3 Unit3 Part1 Vocabulary - Forms of LifeMammal

10、s are covered by hair or fur, have a backbone and are warm-blooded.All female mammals produce milk for their young.Reptiles are covered by scales and include snakes, lizards and turtles.Reptiles have a backbone and are cold-blooded, which means they often rely on external sources of heat.Birds are c

11、overed by feathers and are warm-blooded.Most birds can fly and many types of birds migrate great distances.Most insects such as ants and bees have a small, 3-part body with 3-pairs of legs.Some insects, like mosquitoes, spread diseases that cause the deaths of many humans.Unlike animals, plants get

12、the energy that they need from the sun.Plants convert light energy, along with carbon-dioxide and water, into chemical energy.推荐精选Level3 Unit3 Part1 Vocabulary InstrumentsScales and rulers are used to measure weight and length.Units of weight include kilograms and pounds, and units of length include

13、 centimeters and inches.These instruments are used to observe very large and very small objects.Telescopes are used by astronomers,and microscopes are used by biologists and doctors.These appliances are used in the kitchens of almost every home.Stoves are used to heat food and refrigerators are used

14、 to keep foods cool or cold.Household tools like these are used to build and repair things.Hammers are used to pound in nails and screwdrivers are used to turn a screw.Level3 Unit3 Part1 Dialogue - Dating AnniversaryDo you know what day it is today?What do you mean?Is it a special day?Oh, so you don

15、t remember.Remember what?Whats so special?Its our anniversary.We started dating a year ago today.Oh, really? Sorry.推荐精选Just a minute.What do you think this is?Oh, its a necklace.Do you like it?Yes, I do.Its lovely, especially the red heart.May I put it on?No, let me do it.So you did remember.Of cour

16、se I remembered.Its a very special day for both of us.I have something for you too.You do?Yes, but it will have to wait until later.Oh, I cant wait.Tell me what it is.(Its the first year anniversary of their first date.)Can you guess what it is?Could you give me a hint?We went there six month ago.Oh

17、, you mean Alfredos.Yes, arent you excited?You said you really liked the food there.Yes, thats true.推荐精选I also remember the dessert, do you?Yes, but lets not talk about that now.Lets not ruin the surprise.Level3 Unit3 Part1 Dialogue - Fine DiningThat restaurant looks nice.Yes, but it looks expensive

18、.Lets go in and look the menu.Wow, the menu looks great, especially the fish.Yes, it looks good, but look at those prices.Lets try somewhere else.Sometimes its okay to spend a little money.Yes, but these prices are a bit too high, dont you think?Yes, they are a bit high.But dont you think Im worth i

19、t?Lets enjoy ourselves.Ah, ok, if you put it that way.Lets see if we can get a table.Im glad you have your credit card.I sure hope the food is good.Stop worrying.Lets just enjoy.Level3 Unit3 Part2 Listening - QuickServe 1推荐精选QuickServe is a home repair company.It provides quick, reliable repair serv

20、ices to homes.QuickServe handles plumbing and electrical issues 24 hours a day.It also cleans roofs, fixes internet connections and replaces broken windows.For a small fee, customers subscribe to the service.Its main customers are the elderly, which means older people.Whenever customers have a probl

21、em, they can call for help.There is also a small service charge for each service call.The company was established 5 years ago, and is growing rapidly.It started in one city, but is now in 5 cities.The company plans to expand to 10 cities within the next 24 months.In each city, there is a small centr

22、al office in a low-rent area of the city.The central office handles the business, advertising, payroll and billing.It also takes calls from customers, either online or by telephone.It takes calls 24 hours a day, 7 days a week.60% of the companys employees work from their homes.When a customer calls

23、in to central office, a service employee is contacted.The service employee then contacts the customer and sets up an appointment.These service employees are highly trained and provide excellent service.推荐精选In emergencies, such as a serious plumbing problem, service can be provided within an hour.One

24、 reason for this is that the service employees live in different parts of the city.They are not centrally located, so its quicker and easier for them to travel to a customers home.Level3 Unit3 Part2 Listening - QuickServe 2QuickServe has an excellent reputation.Its prices are reasonable and its serv

25、ices are quick and efficient.The companys service employees are clean, polite and efficient.In this type of business, person to person contact is the key to success.With each satisfied customer, more customers subscribe.Satisfied customers recommend QuickServe to their friends.This kind of word-of-m

26、outh advertising is very cost effective.Cost effective means that the results are good without paying a high price.In other words, quality service provides its own reward to the company.The company takes great pride in being honest with its customers.There are no hidden charges for their services.As

27、 a result, the number of customers in each city is growing rapidly.With the aging population, there are more elderly people who need home repair services.推荐精选These people need to have confidence in the service provider.They dont want to be cheated.These people dont mind paying a reasonable fee for h

28、igh quality service.High quality service should be rewarded.The company provides a range of service plans, each with a different subscription price.The least expensive service plan is called the basic plan.This plan provides non-emergency services with a very low service charge.The most expensive se

29、rvice plan is their VIP plan.The VIP plan provides emergency services 24 hours a day with no additional service charge.It also provides rebates to customers who dont call for any service during the year.In addition, QuickServe gives bonus points to customers for each year that they subscribe.These b

30、onus points can be used to buy new appliances such as stoves and refrigerators.If the business continues to grow, the owners may decide to take the company public.This means that the public can buy shares of the company.It will then change from a privately-owned company to a public company.The owner

31、s believe that their business is successful and can expand around the world.推荐精选They also believe that taking their company public can make them rich.Level3 Unit3 Part2 Vocabulary SciencesBiology is the study of life, including its structure and evolution.Biologists study how life survives and repro

32、duces.Chemistry is the study of matter, including the structure of atoms and molecules.Chemists study how various substances interact with each other.Astronomy is one of the oldest sciences.Astronomers study the structure and evolution of the universe, including the study of stars, planets, and gala

33、xies.Geology is the study of the structure and history of the Earth and other planets.Geologists study different types of rocks, earthquakes and the different layers of the Earth.Mathematics is the study of numbers, shapes, patterns and change.Mathematics is used by all other branches of science.Lev

34、el3 Unit3 Part2 Vocabulary DisastersHere are some types of terrible events that hurt or kill people.Earthquakes are caused by forces deep within the Earth.During earthquakes, many people are often killed by collapsing buildings and bridges.Floods happen when rivers rise and overflow their banks.推荐精选

35、Floodwaters damage or destroy many houses and businesses.Fires destroy buildings, land and forests.There are many causes for fire, including lightning.In a hurricane, high winds destroy buildings, and sometimes cause flooding.Some hurricanes have winds of more than 200 miles an hour.Car accidents ha

36、ppen when cars collide, or when drivers lose control of their cars.One of the main causes of car accidents is driving too fast.Level3 Unit3 Part2 Dialogue - Desk AssemblyWhats in that big box you are carrying?Its a new desk.I just bought it and now I have to put it together.Do you need any help?No,

37、I dont think so.I just need to get my tools.Ill need a screwdriver and maybe a hammer.Dont forget to read the instructions.How are things going?Im almost finished.Something doesnt look right to me.The right side is higher than the left side.Oh, you are right.It looks like I put a couple of screws in

38、to the wrong places.推荐精选So now youll have to take it apart.Great. And I thought I was almost finished.I told you to read the instructions.Did you read them?No, I didnt read them.I hate to read instructions.I looked them, but they were confusing.Well, this is what happens when you dont.You were too i

39、mpatient.Anyway, what can I do to help you?Would you get another screwdriver and help me unscrew some of these screws?OK, but next time please read the instructions.Level3 Unit3 Part2 Dialogue - Life and the UniverseDo you ever look up at the sky and think about life and universe?I did when I was a

40、kid.But I dont do that very much anymore.Why do you ask?Sometimes I feel like Im lost in day-to-day details.Then when I look up at the sky, I see the big picture.I appreciate things more, even the little things.You sound like a philosopher or a poet.推荐精选I felt like that too when I was a kid.Dont you

41、 feel like that anymore?No, I dont.In fact, I try not to.When I think about things too deeply, I get depressed.Its even a bit frightening.Really? For me, its just the opposite.Everything seems like a wonderful miracle.Doesnt that frighten you a bit?The universe is so large and we are so small.What I

42、 realize is how little we understand.We just need to appreciate our lives and not get lost.Sometimes being lost isnt so bad.Do you know the expression, ignorance is bliss?Sure, Ive heard it many times.To be ignorant is to be happy.Maybe its true.Maybe its best not to think or know too much.No, thats

43、 not for me.I want to understand as much as possible.Thats why I became a scientist.Well, I respect your choice, but its not for me.If understanding is painful, Id rather not understand.推荐精选Level3 Unit3 Part3 Listening - Harrys Business Trip 1Harry is on a business trip.Yesterday he was supposed to

44、fly from San Francisco to Shanghai.However, things didnt turn out the way they were supposed to.In fact, nothing went the way it was supposed to.Everything went wrong and he didnt get on his flight.As a result, he is still in San Francisco.The following is a summary of what happened.Yesterday mornin

45、g he got up as usual and had breakfast.Everything seemed to be fine and he was looking forward to the trip.He was just about to check out of his hotel when he felt a pain.It was a pain in his lower back.It was a dull pain at first - not too bad.So he didnt worry about it and checked out of the hotel

46、.Then he got on the shuttle bus to the airport.About halfway to the airport, the pain in his back started to get worse.It was a growing pain, and he was beginning to worry.Soon it was difficult for him to sit in his seat.The pain was getting worse.He wanted to lie down.He started to sweat and breath

47、e quickly.推荐精选He was in real pain then.On a scale of 1 to 10, the pain was an 8.When the bus got to the airport, the bus driver helped him get off.It was difficult for him to walk, but he finally made it to the terminal.Inside the terminal, he went to the mens bathroom.He went to the toilet, but tha

48、t didnt help.Instead of improving, he felt dizzy and he threw up.By now he was wet from all his sweating.He knew he couldnt get on his flight.Level3 Unit3 Part3 Listening - Harrys Business Trip 2He used his phone to call the airline.He explained the situation and cancelled his reservation.Then he ca

49、lled 911 for emergency help.911 is the emergency number to call for help in the United States.An ambulance arrived about 10 minutes after he called.By then he was in so much pain that he could barely walk.Once inside the ambulance, they gave him oxygen to help him breathe.But the pain was still terr

50、ible.Then they drove him into a hospital near the airport.Luckily, the hospital was on his health plan.推荐精选That means his health insurance is supposed to pay for everything.Medical costs in the United States are very high.When he arrived at the hospital, he was taken to the emergency room.After some

51、 tests, a doctor told him he had a kidney stone.It was a very small stone, but it caused a lot of pain.It was passing through a small tube in his body, from his kidney to his bladder.The pain would go away once it got to his bladder.Until then, he had to take pain medicine to reduce the pain.Harry d

52、idnt have to stay at the hospital for very long.With the pain medicine, the pain went away very quickly.He took a taxi back to his hotel and checked in for another night.Then he called the airline and made a reservation for another flight.The flight will leave tomorrow.Until then hell just rest in h

53、is hotel.There may even be a good movie to watch.So, when youre travelling, please be prepared for emergencies.Make sure you have medical insurance.You never know when something like this can happen to you!So be prepared!Level3 Unit3 Part3 Vocabulary - Sources of Energy推荐精选Solar energy is one of the

54、 cleanest and most plentiful sources of energy.Solar power depends on sunlight, so in cloudy weather and at night, no power is generated.Wind energy is non-polluting but is only useful in places where there is a lot of wind.Wind turbines convert the kinetic energy of the wind into mechanical power.N

55、uclear energy is efficient and doesnt produce carbon gases as a waste product.The dangers of nuclear power include deadly radioactive waste products.A major source of energy comes from the burning of fossil fuels, such as coal and oil.When we burn fossil fuels, waste gases such as CO2 are produced.F

56、ossil fuels remain the largest source of energy for most countries.Hydropower comes from the kinetic energy of falling water.Output is reliable and can be regulated to meet the demand, except during periods of drought.(Dams are expensive to build and affect wildlife such as fish.)Level3 Unit3 Part3

57、Vocabulary - Types of wordsHere are some different types of words in English.Words that are nouns or pronouns are used to represent objects.A noun or a pronoun can be a person, an animal or a thing, including an idea.Verbs are used to express actions, such as to sit down or stand up.推荐精选We also use

58、verbs to express relationships, such as to love someone or to own something.We use adjectives to describe objects, such as a tall building.Adjectives are used with nouns and pronouns, but not with verbs.We use adverbs to describe actions, such as to run fast or to walk slowly.Adverbs express the qua

59、lity of an action, such as how well or poorly something is done.We use conjunctions to connect things or actions, such as to read and write.Conjunctions include words such as and, or, because, but and yet.Level3 Unit3 Part3 Dialogue - Good News & Bad NewsHey, Ive got some news, some good news and so

60、me bad news.OK, give me the bad news first.Were moving to a new office.When is this going to happen?We are supposed to move at the end of next month.How far away is the new office?We are not sure yet, but it will mean a longer commute for most of us.The new office will probably be on the other side

61、of the city.The commute is already too long for me and Im not going to change flats.We just bought one.Anyway, whats the good news?推荐精选The good news is that we are going to expand.The company is growing so we are gonna hire more people.Well, Ive got some news for you too.I hope its a good news.Well,

62、 that depends on your point of view.Im planning to start my own business.Why? I thought you were happy working here.I like the work, but Im not learning anything new.I think I can do better on my own.I was planning to wait a few months.But now that the office is moving, Im ready to make the change.What does your wife think?Shes in favor of it and shell help me.Shes already designing a website.Well work from home at first.So you really are serious about this?Youre taking a big risk.Most new businesses fail.Yes, I know, but if I dont do it now, I never will.Im tired of working