I can understand why astronauts find it difficult to readjust to life on earth.
我能明白为什么宇航员们发现难以重新适应地球上的生活。
Life on Earth will become unsustainable unless population growth is held in check.
地球上的生命将无法延续，除非人口增长得到控制。
地球上有生命吗？
Such impacts continue to pose a natural hazard to life on Earth.
这些撞击会持续对地球上的生命构成自然威胁。
In the space of all possible lives, life on Earth is but a tiny sliver—one attempt at creativity.
在所有可能有生命存在的空间里，地球上的生命只占一小条――创造性的一次尝试。
The UFOs, it is believed, must contain scientists from other planets who are studying life on earth.
人们相信，这些不明飞行物中一定有来自其他星球的科学家，他们正在研究地球上的生命。
Understanding this cycle is important, not only because it sustains life on Earth, but also because it is bound up with the rate of global warming.
理解这种循环很重要，不仅因为碳循环维持地球上的生命，而且因为它对于全球变暖的速度有密切关系。
First, a climate conducive to life on Earth depends upon the extraordinarily narrow orbital parameters that define a continuously habitable zone where water can exist in a liquid state.
首先，地球上适宜生命存在的气候取决于极其狭窄的轨道参数，这些参数定义了一个持续可居住的地带，在那里水可以以液态存在。
The development of complex life on Earth depended on the presence of bacteria that could be consumed by larger organisms.
地球上复杂生命的发展依赖于细菌的存在，而细菌可以被更大的有机体所吞噬。
For more than a century, Tyrannosaurus rex has been the King of Dinosaurs, the carnivorous symbol of an entire age in the history of life on Earth.
近一个多世纪以来，雷克斯暴龙不但成为了恐龙帝国的统治者，更是整个地球生命史的肉食象征。
Life on Earth is mind-bogglingly diversity.
地球上的生命具有令人难以想象的多样性。
For Life on Earth - Save Our Seas!
为了地球上的生命-拯救我们的海洋！
Though my life on earth is o 'er.
虽然我已经结束了我在地球上的生命。
When my life on earth was through.
当我的生命逝去。
Otherwise there would not be life on Earth.
否则地球上就没有生命了。
Life on earth is a temporary assignment.
人生在世是一项暂时性的任务。
Why isn't there more variety of life on Earth?
为什么地球上没有更多不同种类的生命形式？
Life on Earth alters Earth to beget more life.
地球上的生命改变着地球以产生更多的生命。
Life on Earth stores genetic information in DNA.
地球上的生命在DNA中储存了基因信息。
The memory of his life on Earth was falling away.
他对尘世生活的记忆已经开始淡薄了。
There was also a cost to the rest of life on Earth.
地球上的其余生命也在为此付出代价。
Life on Earth faces a warm future - and a fiery one.
地球上的生命面临一个“水深火热”的未来。
Life on Earth probably began 3.8 billion years ago.
地球上的生命是在38亿年以前开始出现的。
Ask God to help you see life on earth as he sees it.
求神帮助你学习从他的眼光去看人生。
You were created to add to life on earth, not just take from it.
你肩负着为地球增加生命的责任，而不只是向地球索取。
According to most scientists, all life on Earth has a common ancestor.
很多科学家认为地球上的一切生命都拥有相同的祖先。
On that very question could hinge the fate of much of life on Earth.
对这个问题的回答将关系到地球上大多数生物的命运。
The idea of the last life on Earth, in these geodesic domes in space.
作品的创意是去展示地球上最后的生命，它被挂在太空中的这些网格上。
The ozone layer protects life on Earth from harmful ultraviolet rays.
臭氧层可以保护地球上的生物免受有害紫外线的辐射。
The ozone layer protects life on Earth from harmful ultraviolet rays.
臭氧层可以保护地球上的生物免受有害紫外线的辐射。
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