歌曲 | Lesson 35 Space odyssey |
歌手 | 英语听力 |
专辑 | 新概念英语(第四册) |
[00:01.55] | Lesson 35 |
[00:03.49] | Space odyssey |
[00:12.30] | When will it be possible for us to think seriously about colonising Mars? |
[00:19.69] | The Moon is likely to become the industrial hub of the Solar System supplying the rocket fuels for its ships, |
[00:27.91] | easily obtainable from the lunar rocks in the form of liquid oxygen. |
[00:33.59] | The reason lies in its gravity. |
[00:36.49] | Because the Moon has only an eightieth of the Earth's mass, |
[00:40.86] | it requires 97% less energy |
[00:44.05] | 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! |
[00:53.22] | This may sound fantastic, but it is easily calculated. |
[00:58.20] | To escape from the Earth in a rocket, one must travel at seven miles per second. |
[01:04.38] | The comparable speed from the Moon is only 1.5 miles per second. |
[01:10.68] | Because the gravity on the Moon's surface is only a sixth of Earth's (remember how easily the Apollo astronauts bounded along), |
[01:19.48] | it takes much less energy to accelerate to that 1.5mps than it does on Earth. |
[01:27.36] | Moon dwellers will be able to fly in space at only three percent of the cost of similar journeys by their terrestrial cousins. |
[01:36.69] | Arthur C.Clark once suggested a revolutionary idea passes through three phases: |
[01:43.13] | 1. 'It's impossible--don't waste my time.' |
[01:47.69] | 2. 'It's possible, but not worth doing.' |
[01:53.00] | 3. 'I said it was a good idea all along.' |
[01:58.78] | The idea of colonising Mars--a world 160 times more distant than the Moon--will move decisively from the second phase to the third, |
[02:09.19] | when a significant number of people are living permanently in space. |
[02:14.41] | Mars has an extraordinary fascination for would-be voyagers. |
[02:19.02] | America, Russia and Europe are filled with enthusiasts--many of them serious and senior scientists who dream of sending people to it. |
[02:30.55] | Their aim is understandable. |
[02:33.94] | It is the one world in the Solar System that is most like the Earth. |
[02:38.93] | It is a world of red sandy deserts (hence its name--the Red Planet), |
[02:45.03] | cloudless skies, savage sandstorms, chasms wider than the Grand Canyon and at least one mountain more than twice as tall as Everest. |
[02:56.38] | It seems ideal for settlement. |
[00:01.55] | dì 35 kè |
[00:03.49] | tài kōng tàn suǒ |
[00:12.30] | |
[00:19.69] | |
[00:27.91] | yuè qiú hěn kě néng chéng wéi tài yáng xì de gōng yè zhōng xīn. cóng yuè qiú shàng de yán shí zhōng hěn róng yì tí liàn chū yè tài yǎng, zuò wéi háng tiān fēi chuán de rán liào. |
[00:33.59] | qí yuán yīn zài yú yuè qiú de zhòng lì. |
[00:36.49] | yīn wèi yuè qiú de zhòng zhǐ yǒu dì qiú de 1 8, |
[00:40.86] | |
[00:44.05] | yīn cǐ, cóng yuè qiú dào dì qiú de 25 wàn yīng lǐ suǒ xiāo hào de néng liàng yào bǐ cóng dì qiú biǎo miàn jìn rù dì qiú guǐ dào de 200 yīng lǐ suǒ hào néng liàng shǎo 97. |
[00:53.22] | zhè diǎn tīng qǐ lái lìng rén nán yǐ zhì xìn, dàn què hěn róng yì jì suàn chū lái. |
[00:58.20] | yào chéng zuò yī méi huǒ jiàn fēi lí dì qiú, huǒ jiàn de sù dù yào dá dào měi miǎo 7 yīng lǐ, |
[01:04.38] | ér cóng yuè qiú chū fā de xiāng yìng sù dù què shì měi miǎo 1. 5 yīng lǐ. |
[01:10.68] | yóu yú yuè qiú biǎo miàn dí zhòng lì jǐn shì dì qiú biǎo miàn dí 1 6 hái jì de ā bō luó fēi chuán zhōng de yǔ háng yuán qīng sōng dì tiào yuè |
[01:19.48] | zài yuè qiú shàng jiā sù dào měi miǎo 1. 5 yīng lǐ bǐ zài dì qiú shàng suǒ yòng néng yuán yào shǎo dé duō. |
[01:27.36] | yuè qiú jū mín zài tài kōng áo yóu de fèi yòng jǐn shì dì qiú shàng péng yǒu fēi yuè tóng yàng lù suǒ xū fèi yòng de 3. |
[01:36.69] | yà sè. C. kè lā kè céng tí yì, yī zhǒng chuàng xīn de xiǎng fǎ yào jīng guò yǐ xià 3 gè jiē duàn: |
[01:43.13] | 1." gēn běn bù kě néng, bú yào làng fèi wǒ de shí jiān." |
[01:47.69] | 2." kě néng, dàn bù zhí de zuò." |
[01:53.00] | 3." wǒ yī zhí shuō zhè shì gè hǎo xiǎng fǎ." |
[01:58.78] | |
[02:09.19] | rú guǒ yǒu xiāng dāng shù liàng de rén yǒng jiǔ xìng dì zhù zài tài kōng, zhēng fú huǒ xīng de jì huà yí gè bǐ yuè qiú yuǎn 160 bèi de xīng qiú jiù kě yǐ míng què dì cóng dì 2 jiē duàn jìn rù dì 3 jiē duàn. |
[02:14.41] | |
[02:19.02] | huǒ xīng duì wèi lái de xīng jì lǚ kè shuō yǒu zhe tè shū de mèi lì. měi guó é luó sī hé ōu zhōu dōu yǒu xǔ duō rè xīn cǐ xiàng shì yè de rén qí zhōng de bù shǎo shì rèn zhēn hé zī shēn de kē xué jiā, tā men yī zhí mèng xiǎng zhe bǎ rén sòng shàng huǒ xīng. |
[02:30.55] | tā men de mù biāo shì kě yǐ lǐ jiě de. |
[02:33.94] | huǒ xīng shì tài yáng xì lǐ yǔ dì qiú zuì jiē jìn de yī kē xíng xīng. |
[02:38.93] | zhè shì yí gè hóng sè shā mò de shì jiè yīn ér dé míng: hóng sè xíng xīng, |
[02:45.03] | wú yún de tiān kōng, xiōng měng de shā bào, bǐ dà xiá gǔ hái kuān de liè fèng, qǐ mǎ yǒu yī zuò shān yǒu zhū mù lǎng mǎ fēng de jìn liǎng bèi gāo. |
[02:56.38] | kàn qǐ lái, tā hěn hé shì jū zhù. |