In 1664 Hooke observed a reddish spot on the surface of the planet.
1664年，胡克观察到了那颗行星表面的一个微红的斑点。
Scientists are studying photographs of the planet for signs of life.
科学家仔细察看行星照片，寻找生命迹象。
The newly discovered world followed an orbital path unlike that of any other planet.
新发现的这个天体的运行轨和任何其他行星的不同。
We are reproducing ourselves at such a rate that our numbers threaten the ecology of the planet.
我们繁衍得如此之快，以至于人口数量威胁到地球的生态系统。
The planet is one of 119 known extra-solar planets, objects that orbit stars other than the sun.
这是119颗太阳系外行星中的一颗。这些行星围绕除太阳外的其他星体运行。
Extracting information about the large-scale composition of a planet from a sample weighing a millionth of a gram was a fascinating example of scientific endeavour.
从重量为百万分之一克的样品中提取有关行星宏观组成的信息是一个极为有趣的科学尝试实例。
The next planet out, Uranus—after Saturn.
土星之后的下一颗行星是天王星。
This planet sits in the southern constellation of Fornax.
这颗行星位于天炉星座的南部。
In reality, sea level varies according to the irregular interior of the planet.
事实上，海平面会根据地球不规则的内部而变化。
If there are so many stars out there, that means there might also be a planet just like the planet we live on.
如果那里有那么多星星，那就意味着可能也有一颗和我们居住的行星一样的行星。
Pluto may be a dwarf planet now, Clyde baby, but you're still the first American to discover a planet in my book.
现在，冥王星可能是个矮行星，但是，亲爱的克莱德，在我书中你仍然是第一个发现行星的美国人。
When a large body strikes a planet or moon, material is ejected, thereby creating a hole in the planet and a local deficit of mass.
当一个大型天体撞击行星或月球时，物质会被抛射出去，从而在行星上形成一个洞，造成局部质量不足的现象。
At the same time, today, the actions, and inaction, of human beings imperil not only life on the planet, but the very life of the planet.
与此同时，今天，人类的行动和不作为不仅危害地球上的生命，而且危害地球本身的生命。
The gases that may be warming the planet will have their main effect many years hence.
这些可能正在使行星变暖的气体，其重要影响将在许多年之后显现。
Will robots control our planet?
机器人会控制我们的星球吗？
The whole planet is drier and drier.
整个地球变得越来越干燥了。
It is about half size of our planet.
它大约是地球的一半大小。
Earth—our only home, our great planet.
地球——我们唯一的家园，我们伟大的星球。
It went across one-fourth of the planet.
它跨过了地球的四分之一。
Want to make a difference to our planet?
想要改变我们的星球吗？
A Life on Our Planet is his latest work.
《地球上的生命》是他最新的作品。
Has he returned to his planet and his rose?
他回到他的星球和他的玫瑰旁了吗？
It's not the worst planet I've ever been to.
那还不是我去过的最糟糕的星球。
It is helpful to both people and the planet.
它对人类和地球都有帮助。
This is what the movie Red Planet begins with.
这就是电影《红色星球》的开头。
Earth is the only planet known to support life.
地球是已知的唯一一个支持生命生存的星球。
He decides to join his rose back on his planet.
他决定和他的玫瑰一起回到他的星球上。
One day, a little boy was walking on the planet.
有一天，一个小男孩在这个星球上行走。
They think being a vegetarian can help the planet.
他们认为成为素食者有助于地球。
Water is not just an important part of our planet.
水不仅仅是地球的重要组成部分。
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