邓静蓉9模块unit2的授课课件1

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1、 Zheng He (1371-1433) made seven voyages during his lifetime and contributed greatly to the science of navigation in China. Marco Polo (1254-1324), is probably the most famous Westerner to travel the Silk Road. His journey around Asia lasted 24 years. Captain James Cook (1728 1779) commanded three v

2、oyages of discovery for Great Britain, and sailed around the world twice.modern navigational instrumentsCompassAstrolabe(星盘星盘)Sextant(六分仪六分仪)Sea/Nautical chartearly navigational instrumentsHow did early seamen navigate so well? SAILING THE OCEANSUsing nature to help:Using navigational instruments to

3、 help:Finding longitude, Finding latitude Keeping alongside the coastline, using celestial bodies, using wildlife, using the weather, using the sea What is the use of a bearing circle, astrolabe, quadrant or sextant? ( ) What is the use of a compass? ( ) A. to set the course of the ship B. to measur

4、e the position of the ship C. to measure the speed of the ship D. to tell the timeRead the text carefully and choose the best answer.BA We may well wonder how to plot The voyages of travelers navigational aids were not at the mercy of An early method of measuring speed involved The compass has a spe

5、cial magnetic pointer which Then he could tell if he was sailing on his correct rather than random course. The earliest，the astrolabe, was a special all-in-one tool for However, it was awkward to use as the moving ship itself. The sextant was the updated version of the astrolabe and quadrant whichma

6、y/might well 很可能，极有可能很可能，极有可能 His appearance has changed so much that you may well not recognize him. You might well find that youll need more food and drink by the weekend. plot 标绘，追踪标绘，追踪的位置的位置 He was bent over the table, plotting a new course. We may well wonder how seamen explored the oceans bef

7、ore latitude and longitude made it possible to plot a ships position on a map The voyages of travelers before the 17th century show that they were not at the mercy of the sea even though they did not have modern navigational aids. at the mercy of 任由任由摆布；在摆布；在面前无助面前无助 They were lost at sea, at the me

8、rcy of wind and weather. I dont like to be at the mercy of such a man. An early method of measuring speed involved throwing a knotted rope tied to a log over the side of the ship involve (v.)需要；应当(包括) Winning the game involves both skill and fortune.knot C (绳等的)结 make / tie a knot 打结a log: a thick p

9、iece of wood The compass has a special magnetic pointer (which always indicates the North Pole), so it is used to help find the direction (that the ship needs to go). magnetic adj. 磁的磁的, 有磁性的有磁性的, 有吸引力的有吸引力的 magnetic field U 磁场磁场magnetic pole C 磁极磁极The iron has lost its magnetic force. 磁力磁力a magneti

10、c person 有魅力的人有魅力的人 make a random choice 任意选择任意选择 a random sample 随机的抽样随机的抽样 at random 任意地，随便地任意地，随便地 The killer seems to have killed people at random.Then he could tell if he was sailing on his correct rather than random course.random n. 随意随意, 任意任意 adj. 任意的任意的, 随随便的便的, 胡乱的胡乱的The earliest，the astrol

11、abe, was a special all-in-one tool for telling the position of the ship in relation to the sun and various stars which covered the whole sky I have some comments to make in relation to this matter. The library is quite small in relation to the total population of the town. 关于关于和和相比相比 However, it was

12、 awkward to use as one of the points of reference was the moving ship itself. The camera has a lot of buttons, which makes it awkward to use.He is awkward; he keeps dropping things.There was an awkward silence, when no one knew what to say. An awkward situation arose during the peace talks.难使用的难使用的笨

13、拙的笨拙的尴尬的尴尬的棘手的棘手的The sextant was the updated version of the astrolabe and quadrant which reduced the tendency to make mistakes. tendency n. “倾向，趋势倾向，趋势” have a tendency to /towards 有有的倾的倾向向 I have a tendency to talk too much when Im nervous. My grandma has a strong tendency to forget things.update v. 更新，使成最新更新，使成最新 to update the softwareHomework1. Review this passage.2. Preview Learning about language.