Lesson 43 Are there strangers in space

歌曲 Lesson 43 Are there strangers in space
歌手 英语听力
专辑 新概念英语(第四册)

歌词

[00:01.47] Lesson 43
[00:03.56] Are there strangers in space?
[00:12.47] What does the 'uniquely rational way' for us to communicate with other intelligent beings in space depend on?
[00:22.11] We must conclude from the work of those who have studied the origin of life,
[00:26.87] that given a planet only approximately like our own, life is almost certain to start.
[00:34.34] Of all the planets in our solar system, we are now pretty certain the Earth is the only one on which life can survive.
[00:43.34] Mars is too dry and poor in oxygen, Venus far too hot, and so is Mercury,
[00:50.89] and the outer planets have temperatures near absolute zero and hydrogen-dominated atmospheres.
[00:58.38] But other suns, start as the astronomers call them, are bound to have planets like our own, and as is the number of stars in the universe is so vast,
[01:08.11] this possibility becomes virtual certainty.
[01:12.33] There are one hundred thousand million starts in our own Milky Way alone,
[01:17.34] and then there are three thousand million other milky ways or galaxies, in the universe.
[01:23.88] so the number of stars that we know exist is now estimated at about 300 million million million.
[01:33.03] Although perhaps only 1 percent of the life that has started somewhere will develop into highly complex and intelligent patterns,
[01:41.18] so vast is the number of planets, that intelligent life is bound to be a natural part of the universe.
[01:50.00] If then we are so certain that other intelligent life exists in the universe, why have we had no visitors from outer space yet?
[01:59.59] First of all, they may have come to this planet of ours thousands or millions of years ago,
[02:05.65] and found our then prevailing primitive state completely uninteresting to their own advanced knowledge.
[02:12.82] Professor Ronald Bracewell, a leading American radio astronomer,
[02:17.07] argued in Nature that such a superior civilization, on a visit to our own solar system,
[02:24.69] may have left an automatic messenger behind to await the possible awakening of an advanced civilization.
[02:32.69] Such a messenger, receiving our radio and television signals,
[02:36.67] might well re-transmit them back to its home-planet,
[02:41.12] although what impression any other civilization would thus get from us is best left unsaid.
[02:48.95] But here we come up against the most difficult of all obstacles to contact with people on other planets
[02:55.71] -- the astronomical distances which separate us.
[03:00.06] As a reasonable guess, they might, on an average, be 100 light years away.
[03:06.34] (A light year is the distance which light travels at 186, 000 miles per second in one year, namely 6 million million miles.)
[03:18.70] Radio waves also travel at the speed of light,
[03:22.46] and assuming such an automatic messenger picked up our first broadcasts of the 1920's,
[03:28.68] the message to its home planet is barely halfway there.
[03:33.27] Similarly, our own present primitive chemical rockets,
[03:37.29] though good enough to orbit men, have no chance of transporting us to the nearest other star,
[03:43.57] four light years away, let alone distances of tens or hundreds of light years.
[03:50.39] Fortunately, there is a 'uniquely rational way' for us to communicate with other intelligent beings,
[03:57.55] as Walter Sullivan has put it in his excellent book,
[04:01.28] We Are not Alone.
[04:03.24] This depends on the precise radio frequency of the 21-cm wavelength, or 1420 megacycles per second.
[04:14.81] It is the natural frequency of emission of the hydrogen atoms in space and was discovered by us in 1951;
[04:23.84] it must be known to any kind of radio astronomer in the universe.
[04:29.27] Once the existence of this wave-length had been discovered,
[04:32.99] it was not long before its use as the uniquely recognizable broadcasting frequency for interstellar communication was suggested.
[04:42.12] Without something of this kind, searching for intelligences on other planets would be like trying to
[04:48.21] meet a friend in London without a pre-arranged rendezvous and absurdly wandering the streets in the hope of a chance encounter.

歌词大意

[00:01.47] dì 43 kè
[00:03.56] yǔ zhòu zhōng yǒu wài xīng rén ma?
[00:12.47] wǒ men yǔ yǔ zhòu zhōng qí tā zhì lì shēng mìng jiāo liú de" wéi yī hé lǐ de fāng fǎ" suǒ yī lài de shì shén me?
[00:22.11] gēn jù yán jiū shēng mìng qǐ yuán de rén men suǒ zuò de gōng zuò, wǒ men bì rán huì de chū zhè yàng de jié lùn:
[00:26.87] rú guǒ shè xiǎng yǒu yī kē xíng xīng hé wǒ men dì qiú de qíng kuàng jī běn xiàng shì, nà jī hū kěn dìng huì chǎn shēng shēng mìng.
[00:34.34] wǒ men mù qián kě yǐ kěn dìng de shì, zài wǒ men tài yáng xì de suǒ yǒu xíng xīng zhōng, dì qiú shì shēng mìng néng cún zài de wéi yī xíng xīng.
[00:43.34] huǒ xīng tài gān zào yòu quē yǎng, jīn xīng tài rè, shuǐ xīng yě yí yàng,
[00:50.89] qí tā wài wéi xíng xīng de wēn dù dōu jiē jìn jué duì líng dù, ér qiě tā men de dà qì chéng fèn zhǔ yào shì qīng qì.
[00:58.38] dàn shì, qí tā tài yáng, jí tiān wén xué jiā suǒ shuō de héng xīng, qí zhōu wéi kěn dìng yě huì yǒu xiàng wǒ men dì qiú yí yàng de xíng xīng. yīn wèi yǔ zhòu zhōng héng xīng shù mù jí qí páng dà,
[01:08.11] suǒ yǐ cún zài zhe yǒu shēng mìng de xíng xīng de zhè zhǒng kě néng xìng jī hū shì què dìng wú yí de.
[01:12.33] jǐn wǒ men yín hé xì jiù yǒu 1000 yì kē héng xīng,
[01:17.34] ér qiě zài yǔ zhòu zhōng hái yǒu 30 yì gè qí tā tiān hé huò zhě xīng xì.
[01:23.88] yīn cǐ, wǒ men suǒ zhī dào de xiàn yǒu de héng xīng shù mù gū jì yuē yǒu 3 10 20 kē.
[01:33.03] suī rán zài yǔ zhòu zhōng mǒu gè dì fāng chǎn shēng de shēng mìng zhǐ yǒu 1 de kě néng xìng huì fā zhǎn chéng gāo dù fù zá de yǒu zhì lì de shēng mìng xíng tài,
[01:41.18] dàn xíng xīng de shù mù shì rú cǐ jù dà, yīn cǐ yǒu zhì lì de shēng mìng bì rán shì yǔ zhòu de zì rán zǔ chéng bù fen.
[01:50.00] jì rán wǒ men rú cǐ jiān xìn yǔ zhòu zhōng cún zài zhe qí tā yǒu zhì lì shēng mìng, nà me wèi shí me wǒ men wèi zēng jiàn dào wài tài kōng lái fǎng de kè rén ne?
[01:59.59] shǒu xiān, tā men kě néng zài shù qiān nián huò shù bǎi wàn nián qián jiù yǐ jīng lái guò wǒ men dì qiú,
[02:05.65] bìng qiě fā xiàn wǒ men dāng shí pǔ biàn cún zài de yuán shǐ zhuàng tài yǔ tā men xiān jìn de zhī shí xiàng bǐ shì suǒ rán wú wèi de.
[02:12.82] měi guó de yī wèi zhǔ yào de shè diàn tiān wén xué jiā luó nà dé bù léi sī wéi ěr jiào shòu,
[02:17.07] zài zì rán zá zhì shàng tí chū zhè yàng de guān diǎn: jiǎ rú yǒu rú cǐ gāo jí wén míng fǎng wèn le wǒ men tài yáng xì,
[02:24.69] hěn kě néng huì zài lí kāi shí liú xià zì dòng huà xìn xī zhuāng zhì, děng dài xiān jìn wén míng de jué xǐng.
[02:32.69] zhè zhǒng zì dòng huà xìn xī zhuāng zhì, zài jiē shōu dào wǒ men de wú xiàn diàn hé diàn shì xìn hào hòu,
[02:36.67] wán quán yǒu kě néng bǎ zhèi xiē xìn hào fā sòng huí yuán lái de xíng xīng,
[02:41.12] zhì yú qí tā wén míng xíng xīng duì wǒ men dì qiú huì yǒu shén me yìn xiàng, hái shì zàn shí bù shuō wèi hǎo.
[02:48.95] dàn shì wǒ men suǒ yù dào de zǔ ài wǒ men yǔ qí tā xíng xīng jū mín lián xì de zuì dà kùn nán,
[02:55.71] shì fēn gé wǒ men de tiān wén jù lí.
[03:00.06] jù hé lǐ gū jì, wài xīng rén lí wǒ men de píng jūn jù lí yǒu 100 guāng nián nà me yuǎn.
[03:06.34] yī guāng nián shì guāng yǐ 186000 yīng lǐ měi miǎo de sù dù chuán bō yī nián de jù lí, jí liù wàn yì yīng lǐ.
[03:18.70] wú xiàn diàn bō yě shì yǐ guāng sù chuán bō de,
[03:22.46] jiǎ dìng wài xīng rén de zhè zhǒng zì dòng huà zhuāng zhì jiē shōu dào le wǒ men 20 shì jì 20 nián dài de dì yī cì guǎng bō xìn hào,
[03:28.68] nà me zhè gè xìn hào zài fā sòng huí yuán lái de xíng xīng de tú zhōng cái gāng zǒu le yī bàn lù chéng.
[03:33.27] tóng yàng wǒ men mù qián suǒ yòng de yuán shǐ de shǐ yòng huà xué rán liào de huǒ jiàn,
[03:37.29] suī rán kě yǐ bǎ wǒ men sòng shàng guǐ dào, dàn hái bù zú yǐ bǎ wǒ men sòng dào lí wǒ men zuì jìn xiāng jù yuē sì guāng nián de qí tā héng xīng shǎng qù,
[03:43.57] gèng bù yòng shuō jǐ shí huò zhě jǐ bǎi guāng nián yuǎn de dì fāng le.
[03:50.39] xìng yùn de shì, yǒu yī zhǒng wǒ men kě yǐ hé qí tā yǒu zhì lì shēng mìng tōng xùn lián xì de" wéi yī hé lǐ de fāng fǎ",
[03:57.55] zhèng rú wò ěr tè shā lì wén zài qí jié zuò
[04:01.28] wǒ men bìng bù gū dú zhōng chǎn shù de.
[04:03.24] zhè zhǒng tōng xùn fāng fǎ yào yī kào bō cháng wèi 21 lí mǐ, pín lǜ jīng què wèi měi miǎo 1420 zhào zhōu de wú xiàn diàn bō.
[04:14.81] zhè gè pín lǜ shì yǔ zhòu zhōng qīng yuán zǐ suǒ fā shè dì diàn cí bō de běn zhēng pín lǜ, shì zài 1951 nián bèi rén lèi fā xiàn de.
[04:23.84] zhè gè pín lǜ shì rèn hé shè diàn tiān wén xué jiā dōu bì dìng shú xī de.
[04:29.27] yī dàn zhè zhǒng bō cháng de diàn cí bō de shí jì cún zài bèi fā xiàn,
[04:32.99] tí chū bǎ zhè zhǒng wéi yī de chuán bō pín lǜ kě jiǎn cè de diàn cí bō yòng yú xīng jì jiāo liú yě jiù wéi qī bù yuǎn le.
[04:42.12] rú guǒ méi yǒu zhè zhǒng shǒu duàn, yào xiǎng xún mì qí tā xīng qiú shàng de zhì lì shēng mìng,
[04:48.21] jiù rú tóng qù lún dūn jiàn yī wèi péng yǒu, shì xiān wèi yuē dìng dì diǎn, ér huāng táng dì zài jiē shàng yóu guàng, yǐ qī pèng qiǎo yù shàng yí yàng.