Person's life only once, can not change, copy, in today's world of law also does not allow cloning.
人的生命只有一次，不能改变，不能复制，当今世界的法律还不允许克隆。
Youth, give you, my life only once, prime not heavy, once a day morning, when encouraged in time, time and tide wait for no man.
青春，只赋予你、我一生一次，盛年不重来，一日难再晨，及时当勉励，岁月不待人。
We each person's life only once, so we all want to cherish life, can't make fun of life, be sure to anywhere to safety awareness.
我们每个人的生命只有一次，所以都要珍惜生命，不能拿生命开玩笑，一定要随时随地都要安全意识。
Teachers, students, human life only once, love life, the most important thing is to establish safety awareness, strengthen security precautions.
老师们、同学们，人的生命只有一次，关爱生命最重要的是树立安全意识，加强安全防范。
An episode of major depression may occur only once in a person's lifetime, but more often, it recurs throughout a person's life.
重度抑郁发作可能在一个人的一生中仅出现一次，但更经常的是，它在一个人的一生中反复出现。
How many of us go through life like the elephants—believing that it was beyond our ability to do something only because we failed once or some times before?
我们中有多少人过着像大象一样的生活——仅仅因为之前失败过一次或几次，就认为自己的能力无法完成某件事？
And that, Lane and Martin conclude, may well explain why complex life — eukaryotes — only evolved once in all of Earth's history.
莱恩和马丁总结而这很可能解释为什么复杂的生命——真核生物——在地球的历史上仅进化了一次。
Proteins, which are the building blocks of life, come in long chains of molecules that work properly only once they have folded into their final, three-dimensional shape.
蛋白质是生命的建造材料，它们是长分子链，只有在这些分子被组合成最终的三维形态时才可正常运作。
Pack all there is into your life; you only pass this way once!
盘点生活中的一切，你只有一次机会！
The finding not only presents the possibility that alternative life forms can exist, or once existed, on Earth.
这一发现不仅显示了地球上可能存在其他类型的生命，或者曾经存在过。
Mars is the only other planet that once had water on its surface – which is why scientists are looking for signs of life there.
除地球以外，火星是唯一的另一个存在表层水的行星。为此，科学家正在那里寻找生命的迹象。
They only came to the trial once a week, and each time the same thing happened: the intrusion of horror into daily life.
他们一星期只来参加一次审判，每次都发生同样的事情：恐怖侵入他们日常的生活。
And I stubbornly believe that such love can only be experienced once in my life.
而我，固执的相信，这种情感，在我的生命中，只有一次。
For once in my life, I stopped suppressing my feelings - only then can we start to confront them.
生平第一次，我不再压抑自己的情感- - - - - -只有这样我们才能开始控制自己的情感。
Chris claims to have only lost a nail once, when fixing her car engine on the freeway, and otherwise has no trouble leading a normal life.
克丽丝说只有一次她的指甲受损了，当时她在高速公路旁修理汽车的发动机，除此之外日常生活中从没有过什么麻烦。
That may be a lofty goal considering I've only run more than a few miles once in my life.
考虑到我平生只跑过不超过几英里，这看上去是一个崇高的目标。
Once matchmaking starts, they may be expected to choose a life partner after only a brief courtship.
一旦相亲开始，人们可能期望她们仅在短暂恋爱后选择一生的伴侣。
I will try to live through this day only and not tackle my whole life problem at once.
我将尽力只度过今天而不立刻去解决终身的问题。
There was also something faintly worrying in the oft-quoted saying - a wise man climbs Mount Fuji once in his life; only a fool climbs it twice. But we were curious.
有一种常听到的说法也隐隐使人担忧——聪明人一生中登一次富士山，只有傻瓜才会登两次，但是我们对此很好奇。
According to its risk model, one investment bank suffered a loss on several consecutive days that should only have occurred once in 14 life-spans of our universe.
按照这种理论的风险模型，一家投资银行连续几天内遭受的损失之巨大，其发生的概率为14个我们宇宙寿命的时间内才会出现一次。
Only once she had left did she realise this was a mistake: she missed office life.
然后她意识到选择离开是个错误，因为她想念办公室的生活。
Only once she had left did she realise this was a mistake: she missed office life.
然后她意识到选择离开是个错误，因为她想念办公室的生活。
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