新概念第四册课文翻译及学习笔记：Lesson35

2015-01-28 14:14:27来源：网络

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【课后题及答案解析】新概念英语第一册新概念英语第二册新概念英语第三册新概念英语第四册
【经验分享】学习新概念英语如何提升英语水平? 自学四大经典学习方法新概念学习方法及经验

　　为了方便同学们的学习，新东方在线新概念英语频道为大家整理了最全面的新概念第四册课文翻译及学习笔记，希望为大家的新概念英语学习提供帮助!

　　【课文】

　　First listen and then answer the following question.

　　听录音，然后回答以下问题。

　　When will it be possible for us to think seriously about colonising Mars?

　　The Moon is likely to become the industrial hub of the Solar System, supplying the rocket fuels for its ships, easily obtainable form the lunar rocks in the from of liquid oxygen. The reason lies in its gravity. Because the Moon has only an eightieth of the Earth's mass, it requires 97 per cent less energy to travel the quarter of a million miles from the Moon to Earth-orbit than the 200 mile-journey from Earth's surface into orbit!

　　This may sound fantastic, but it is easily calculated. To escape from the Earth in a rocket, one must travel at seven miles per second. The comparable speed from the Moon is only 1.5 miles per second. Because the gravity on the Moon's surface is only a sixth of Earth's (remember how easily the Apollo astronauts bounded along), it takes much less energy to accelerate to that 1.5 miles per second than it does on Earth. Moon-dwellers will be able to fly in space at only three per cent of the cost of similar journeys by their terrestrial dwellers will be able to fly in space at only three per cent of the cost of similar journeys by their terrestrial cousins.

　　Arthur C. Clark once suggested a revolutionary idea passes through three phases:

　　1 'It's impossible -- don't waste my time.'

　　2 'It's possible, but not worth doing.'

　　3 'I said it was a good idea all along.'

　　The idea of colonising Mars -- a world 160 times more distant time the Moon -- will move decisively from the second phase to the third, when a significant number of people are living permanently in space. Mars has an extraordinary fascination for would-be voyagers. America, Russia and Europe are filled with enthusiasts -- many of them serious and senior scientists -- who dream of sending people to it. Their aim is understandable. It is the one world in the Solar System that is most like the Earth. It is a world of red sandy deserts (hence its name -- the Red Planet), cloudless skies, savage sandstorms, chasms wider than the Grand Canyon and at least one mountain more than twice as tall as Everest. It seems ideal for settlement.

　　7 DAYS, February 19, 1989

　　【New words and expressions 生词和短语】

　　hub n. (活动的)中心

　　lunar adj. 月球的

　　oxygen n. 氧气

　　Apollo n. 阿波罗

　　accelerate v. 加速

　　terrestrial adj. 地球的

　　permanently adv. 永远地

　　fascination n. 魅力

　　senior adj. 资历深的，年长的

　　chasm n. 断层，裂口