英语翻译When imaginative men turn their eyes towards space and w

英语翻译
When imaginative men turn their eyes towards space and wonder whether life exist in any part of it,they may cheer themselves by remembering that life need not resemble closely the life that exists on Earth.Mars looks like the only planet where life like ours could exist,and even this is doubtful.But there may be other kinds of life based on other kinds of chemistry,and they may multiply on Venus or Jupiter.At least we cannot prove at present that they do not.
Even more interesting is the possibility that life on their planets may be in a more advanced stage of evolution.Present-day man is in a peculiar and probably temporary stage.His individual units retain a strong sense of personality.They are,in fact,still capable under favorable circumstances of leading individual lives.But man's societies are already sufficiently developed to have enormously more power and effectiveness than the individuals have.
It is not likely that this transitional situation will continue very long on the evolutionary time scale.Fifty thousand years from now man's societies may have become so close-knit that the individuals retain no sense of separate personality.Then little distinction will remain between the organic parts of the multiple organism and the inorganic parts (machines) that have been constructed by it.A million years further on man and his machines may have merged as closely as the muscles of the human body and the nerve cells that set them in motion.
The explorers of space should be prepared for some such situation.If they arrive on a foreign planet that has reached an advanced stage (and this is by no means impossible),they may find it being inhabited by a single large organism composed of many closely cooperating units.
The units may be “secondary” — machines created millions of years ago by a previous form of life and given the will and ability to survive and reproduce.They may be built entirely of metals and other durable materials.If this is the case,they may be much more tolerant of their environment,multiplying under conditions that would destroy immediately any organism made of carbon compounds and dependent on the familiar carbon cycle.
Such creatures might be relics(遗物) of a past age,many millions of years ago,when their planet was favorable to the origin of life,or they might be immigrants from a favored planet.
57.What does the word “cheer” (Line 2,Para.1) imply?

新东方09年6月大学英语六级模拟试题
翻译如下：
当富有想象力的人望向宇宙,想知道其他地方是否存在生命,他们也许要记住,生命体不需要以类似于地球上存在的生命形式存在.火星看起来是唯一的其上生命体如同我们一般存在的星球,但甚至这也是值得怀疑的.但也有可能有其他基于其他化学类型的生命,他们可以存在于金星或木星上.至少我们目前不能证明它们不存在.
更有趣的是,存在在他们的星球上的生命可能进化到更高级阶段的可能性.今天的人类正处于一个特殊而可能短暂的阶段.他们保有强烈的个人意识.事实上,他们在好的环境下仍能主导自己的生活.但人的社会已经发展到足以比个人更有权力,更有效率.
在进化的时间上,这种过渡的情况是不可能持续很长时间的.从现在开始的五万年,人类社会将有可能变得如此紧密以至于个人保留独立人格毫无意义.已形成的有机体的有机组成部分和无机部分之间区别如此之小的.未来一百万年对人类和其机体的影响将随着人体的肌肉和神经细胞的运转越来越小.
空间探索者应该为一些这样的情况做好准备.如果他们来到一个已经进化到高级阶段（这是不可能的）的外星球,他们可能会发现上面栖息的是由一个单一的由许多密切合作的小单位组成的大型生物种群.
这些单位可能是“第二层级”——由数百万年前由以前的生活形式创造拥有生存和繁殖能力的机体.他们可能是由完全的金属和其他耐用的材料构成.如果是这样的话,他们可能对环境有更高的容忍度,这会建立在立即破坏碳化合物组成的机体和依赖于熟悉的碳循环的生物的条件下.
这种生物可能是数百万年前,一个过去的时代文物（遗物）,那时他们的星球有利于生命的起源,或者他们可能是从一个星球过来移民.