新概念英語暑假班課程

新概念英語第四冊(cè)課文原文：宇宙中有外星人嗎？

832. We must conclude from the work of those who have studied the origin of life,

根據(jù)研究生命起源的人們所作的工作，我們必然會(huì)得出這樣的結(jié)論：

833. that given a planet only approximately like our own, life is almost certain to start.

如果設(shè)想有一顆行星和我們地球的情況基本相似，那幾乎肯定會(huì)產(chǎn)生生命。

834. Of all the planets in our solar system, we ware now pretty certain the Earth is the only one on which life can survive.

我們目前可以肯定的是，在我們太陽系的所有行星中，地球是生命能存在的唯一行星。

835. Mars is too dry and poor in oxygen,

火星太干燥又缺氧，

836. Venus far too hot, and so is Mercury,

金星太熱，水星也一樣。

837. and the outer planets have temperatures near absolute zero and hydrogen-dominated atmospheres.

除此之外，太陽系的其他行星的溫度都接近絕對(duì)零度，并圍繞著以氫氣為主的大氣層。

838. 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, this possibility becomes virtual certainty.

但是，其他的太陽，既天文學(xué)家所說的恒星，肯定會(huì)有像我們地球一樣的行星。因?yàn)橛钪嬷泻阈堑臄?shù)目極其龐大，所以存在著產(chǎn)生生命星球的這種可能性是肯定無疑的。

839. There are one hundred thousand million starts in our own Milky Way alone, and then there are exist is now estimated at about 300 million million.

僅我們的銀河系就有1000億顆星，況且在宇宙中還有30億個(gè)天河，即銀河系。因此，我們所知道的現(xiàn)有恒星數(shù)目估計(jì)約有30億X1000億顆。

840. Although perhaps only 1 per cent of the life that has started somewhere will develop into highly complex and intelligent patterns,

雖然在已經(jīng)產(chǎn)生生命的某個(gè)地方，可能只有1%會(huì)發(fā)展成高度復(fù)雜有智力的生命形態(tài)，