Lesson 55 From the earth: Greetings

歌曲 Lesson 55 From the earth: Greetings
歌手 英语听力
专辑 新概念英语(第三册)

歌词

[00:01.040] --- lesson 55 From the earth: Greetings
[00:07.200] --- Listen to the tape then answer the question below.
[00:13.200] --- Which life forms are most likely to develop on a distant planet?
[00:20.120] Recent developments in astronomy have made it possible to detect planets in our own Milky Way and in other galaxies.
[00:28.840] This is a major achievement because, in relative terms, planets are very small and do not emit light.
[00:37.240] Finding planets is proving hard enough, but finding life on them will prove infinitely more difficult.
[00:44.960] The first question to answer is whether a planet can actually support life.
[00:50.560] In our own solar system, for example, Venus is far too hot and Mars is far too cold to support life.
[01:00.080] Only the Earth provides ideal conditions, and even here it has taken more than four billion years for plant and animal life to evolve.
[01:10.960] Whether a planet can support life depends on the size and brightness of its star, that is its 'sun'.
[01:19.320] Imagine a star up to twenty times larger, brighter and hotter than our own sun.
[01:26.440] A planet would have to be a very long way from it to be capable of supporting life.
[01:32.360] Alternatively, if the star were small, the life-supporting planet would have to have a close orbit round it and also provide the perfect conditions for life forms to develop.
[01:43.960] But how would we find such a planet?
[01:47.120] At present, there is no telescope in existence that is capable of detecting the presence of life.
[01:53.680] The development of such a telescope will be one of the great astronomical projects of the twenty-first century.
[02:01.360] It is impossible to look for life on another planet using earth-based telescopes.
[02:06.640] Our own warm atmosphere and the heat generated by the telescope would make it impossible to detect objects as small as planets.
[02:16.000] Even a telescope in orbit round the earth, like the very successful Hubble telescope, would not be suitable because of the dust particles in our solar system.
[02:27.200] A telescope would have to be as far away as the planet Jupiter to look for life in outer space,
[02:34.280] because the dust becomes thinner the further we travel towards the outer edges of our own solar system.
[02:41.080] Once we detected a planet, we would have to find a way of blotting out the light from its star,
[02:47.240] so that we would be able to 'see' the planet properly and analyse its atmosphere.
[02:52.680] In the first instance, we would be looking for plant life, rather than 'little green men'.
[02:59.480] The life forms most likely to develop on a planet would be bacteria.
[03:04.840] It is bacteria that have generated the oxygen we breathe on earth.
[03:09.800] For most of the earth's history they have been the only form of life on our planet.
[03:15.280] As Earth-dwellers, we always cherish the hope that we will be visited by little green men and that we will be able to communicate with them.
[03:25.000] But this hope is always in the realms of science fiction.
[03:29.120] If we were able to discover lowly forms of life like bacteria on another planet, it would completely change our view of ourselves.
[03:38.520] As Daniel Goldin of NASA observed, 'Finding life elsewhere would change everything.
[03:45.880] No human endeavor or thought would be unchanged by it.'

歌词大意

[00:01.040] lái zì dì qiú de wèn hòu
[00:07.200] tīng lù yīn, rán hòu huí dá yǐ xià wèn tí.
[00:13.200]
[00:20.120] tiān wén xué fāng miàn zuì xīn fā zhǎn shǐ de wǒ men néng gòu zài yín hé xì hé qí tā xīng xì fā xiàn xíng xīng.
[00:28.840] zhè shì yí gè zhòng yào de chéng jiù, yīn wèi xiāng duì lái shuō, xíng xīng hěn xiǎo, ér qiě yě bù fā guāng.
[00:37.240] xún zhǎo xíng xīng zhèng míng xiāng dāng kùn nán, dàn shì yào zài háng xīng shàng fā xiàn shēng mìng huì biàn de wú bǐ jiān nán.
[00:44.960] dì yí gè xū yào jiě dá de wèn tí shì yī kē xíng xīng shì fǒu yǒu néng gòu wéi chí shēng mìng de tiáo jiàn.
[00:50.560] jǔ lì lái shuō, zài wǒ men de tài yáng xì lǐ, duì yú shēng mìng lái shuō, jīn xīng de wēn dù tài gāo, ér huǒ xīng de wēn dù zé tài dī.
[01:00.080] zhǐ yǒu dì qiú tí gōng le lǐ xiǎng de tiáo jiàn, ér jí shǐ zài zhè lǐ, zhí wù hé dòng wù de jìn huà yě yòng le 40 yì nián de shí jiān.
[01:10.960] yī kē xíng xīng shì fǒu néng gòu wéi chí shēng mìng qǔ jué yú tā de héng xīng jí tā de" tài yáng" de dà xiǎo hé liàng dù.
[01:19.320] shè xiǎng yī xià, yī kē héng xīng bǐ wǒ men de tài yáng hái yào dà, hái yào liàng, hái yào rè 20 bèi,
[01:26.440] nà me yī kē xíng xīng wèi le wéi chí shēng mìng jiù yào lí tā de héng xīng fēi cháng yuǎn.
[01:32.360] fǎn zhī, rú guǒ héng xīng hěn xiǎo, wéi chí shēng mìng de xíng xīng jiù yào zài lí héng xīng hěn jìn de guǐ dào shàng yùn xíng, ér qiě yào yǒu jí hǎo de tiáo jiàn cái néng shǐ shēng mìng dé yǐ fā zhǎn.
[01:43.960] dàn shì, wǒ men rú hé cái néng zhǎo dào zhè yàng yī kē xíng xīng ne?
[01:47.120] xiàn zài, méi yǒu yī tái xiàn cún de wàng yuǎn jìng kě yǐ fā xiàn shēng mìng de cún zài.
[01:53.680] ér kāi fā zhè yàng yī tái wàng yuǎn jìng jiāng huì shì 21 shì jì tiān wén xué de yí gè zhòng yào de yán jiū kè tí.
[02:01.360] shǐ yòng fàng zhì zài dì qiú shàng de wàng yuǎn jìng shì wú fǎ guān chá dào qí tā xíng xīng shàng de shēng mìng de.
[02:06.640] dì qiú zhōu wéi wēn nuǎn de dà qì céng hé wàng yuǎn jìng sàn chū de rè liàng shǐ de wǒ men gēn běn bù kě néng zhǎo dào bǐ xíng xīng gèng xiǎo de wù tǐ.
[02:16.000] jí shǐ shì yī tái fàng zhì zài wéi rào dì qiú de guǐ dào shàng de wàng yuǎn jìng rú fēi cháng chéng gōng de hā bó wàng yuǎn jìng yě yīn wèi tài yáng xì zhōng de chén āi wēi lì ér wú fǎ shèng rèn.
[02:27.200] wàng yuǎn jìng yào fàng zhì zài mù xīng nà yàng yáo yuǎn de xíng xīng shàng cái yǒu kě néng zài wài céng kōng jiān sōu xún shēng mìng,
[02:34.280] yīn wèi wǒ men yuè shì jiē jìn tài yáng xì de biān yuán, chén āi jiù yuè xī bó.
[02:41.080] yī dàn wǒ men zhǎo dào zhè yàng yī kē xíng xīng, wǒ men jiù yào xiǎng bàn fǎ jiāng tā de héng xīng shè guò lái de guāng xiàn zhē àn,
[02:47.240] zhè yàng wǒ men jiù néng chè dǐ" kàn jiàn" zhè kē xíng xīng, bìng fēn xī tā de dà qì céng.
[02:52.680] shǒu xiān wǒ men yào xún zhǎo zhí wù, ér bú shì nà zhǒng" xiǎo lǜ rén".
[02:59.480] xíng xīng shàng zuì róng yì shēng cún xià lái de shì xì jūn.
[03:04.840] zhèng shì xì jūn shēng chǎn chū wǒ men zài dì qiú shàng hū xī de yǎng qì.
[03:09.800] zài dì qiú shàng fā zhǎn de dà bù fèn jìn chéng zhōng, xì jūn shì dì qiú shàng wéi yī de shēng mìng xíng shì.
[03:15.280] zuò wéi dì qiú shàng de jū mín, wǒ men zǒng cún yǒu zhè yàng de xī wàng: xiǎo lǜ rén lái bài fǎng wǒ men, ér wǒ men kě yǐ hé tā men jiāo liú.
[03:25.000] dàn shì, zhè zhǒng xī wàng zǒng shì zhī zài kē huàn xiǎo shuō zhōng cún zài.
[03:29.120] rú guǒ wǒ men néng gòu zài lìng yī kē xíng xīng shàng zhǎo dào zhū rú xì jūn nà zhǒng dī děng shēng mìng, nà me zhè gè fā xiàn jiāng chè dǐ gǎi biàn wǒ men duì wǒ men zì jǐ de kàn fǎ.
[03:38.520] zhèng rú měi guó guó jiā háng kōng hé yǔ zhòu háng kōng jú de dān ní ěr. gē ěr dīng zhǐ chū de" zài qí tā dì fāng fā xiàn shēng mìng huì gǎi biàn yī qiè.
[03:45.880] rèn hé rén lèi de nǔ lì hé xiǎng fǎ dōu huì fā shēng biàn huà."
[03:51.960]