As geologists, we examine layers of sediment on the Earth' s surface to approximate the dates of past geologic time periods.
作为地质学家，我们研究地球表面的沉积层以估算过去地质时期的年代。
One question that has baffled planetary scientists is how oceans formed on the surface of terrestrial planets like Earth — rocky planets made of silicate and metals.
一个困扰着行星科学家的问题是：海洋是怎样在像地球这样由硅酸盐和金属组成的石质行星的表面形成的？
Maps (on paper or on the screen) are flat surfaces; they require a transformation from the curved surface of the earth to the flat plane: a map projection.
纸上或屏幕上的地图是平面的；它们需要从地球的曲面向平面进行转换：地图投影。
It is about 8 times the mass of Earth, and located in an orbit just right for liquid water to exist on the surface.
它大概是地球质量的8倍而且它所在的轨道恰好有益于在其表面有液态水的存在。
Caves belong to the most enigmatic formations, created by Mother Nature on the surface of planet Earth, or, to be more accurate, beneath it.
洞穴堪称最神秘的构造，是大自然母亲在地球表面，或者更精确些，在地表以下巧夺天工的创造。
It might be one of the most unconventional hospital wards on Earth, except that technically it's not on Earth: it's hundreds of meters below the surface.
这里也许是地球上最不规范的住院部，只可惜，严格地说它不在地球上，因为它在地面以下数百米处。
Since the Moon always presents the same face to Earth as the result of "tidal locking", direct communication links with devices on the lunar surface can be maintained continuously.
由于“潮汐锁定”的作用，月球总是以同一个侧面对着地球，这样，设立在月球表面的通信设施就可以与地球保持不间断的直接联系。
Astronomers think that the surface of the moon is dust. On the earth, rocks store heat from the sun.
天文学家们认为，月球的表面是尘埃，而地球上岩石能储存太阳的热量。
On his map, the surface of the earth is convex.
在他的地图上，地球表面呈圆凸状。
Most of this surface is sea, and the water below it—over 97% of the total on Earth—is salty.
太空看地球，水面远远多出地面，水面之下咸涩的海水在地球储水总量中的比重超过了97%。
On our spherical Earth, gravity pulls "down" us toward the planet's center of mass. So on a flat surface, we naturally stand up straight.
在我们地球上，重力会把我们拉向星球的质量中心，因此在平坦的地表，我们自然站得很直。
There's a huge microbial biosphere hidden beneath the surface of the earth - possibly comparable in biomass to the plant life we can see on the surface.
地表之下存在着一个巨大的微生物圈——其生物量可能相当于我们在地表能看到的植物的生物量。
Astarquake is thought to be the tearing apart of the surface of a neutron star, much like an earthquake here on earth.
恒星地震拒信可以撕裂中子星表面，其所能产生的破坏力很像地球上的地震。
The finding could mean that various building blocks of life were common in pools of water on the surface of the early Earth.
这就意味着在早期地球表面巨大的海洋中各种构成生命的基本成分是很常见的。
The lowest point on the surface of the Earth, tourists come from around the world to float in the Dead Sea, a lake lying between the countries of Israel and Jordan.
在地球表面上的最低点，来自世界各地的游客到此只是为了在死海上漂浮。它位于以色列和约旦之间。
A SPACE probe plunges its way through Titan's atmosphere and lands safely on the surface. Over a billion kilometres away here on Earth, a machine fills a bag of potato crisps.
空间探测器穿过浓浓的大气降落在了泰坦星的表面上，而在千里之外的地球上，一台机器正在给炸薯片装袋。
"The old moon in the new moon's arms" is nothing but that part of the moon's surface on which it is night, lighted up by earth light.
新月抱旧月“只不过就是月球表面上正处于黑夜的那一部分被地球的反射光反照的结果。”
For example, so examples coming from real life, so for example, you can look at the temperature at the certain point on the surface of the earth.
例如，一些生活上的例子，比如你可以观察，在地球表面某些特定点的温度。
You were the most rigorous woman on the surface of the earth. I was the most easy-going guy on the face of the planet.
你是这个世界上最苛刻的女人，而我是这个世界上最易相处的男人。
Air pressure on the surface of the Earth is fairly constant, so in designing a microphone for use on land, engineers don't have to worry about large variations in air pressure.
地球表面的气压相对稳定，因此设计地面用的传音器，工程师并不需烦恼气压的大幅变化。
Pieces of the lander were removed and returned to Earth after spendingtwo years on the lunar surface. (NASA)
“勘测者3号”在月球表面工作两年时间以后，其零部件被拆卸，然后运回了地球。
About one in every 20 meteorites that falls on the surface of the Earth is probably a bit of Vesta.
落在地球的陨石中，每二十块中就约有一块可能来自灶神星。
One of the reasons life is short on Earth, for both humans and animals living on the surface, is the damaging rays of the sun.
生活在地球上是短期的，表面上生活的人类和动物，原因之一是太阳有害的射线。
The earthquake is the earth surface, it's like a rapid vibration tsunami, tornado, freeze disaster on earth as often happens, is a kind of natural disasters.
地震就是地球表层的快速振动，它就像海啸、龙卷风、冰冻灾害一样，是地球上经常发生的一种自然灾害。
Meteorite strike events have severe, great and long-term impact on strata structure of the earth surface.
历史上发生的陨击事件对地球表面岩层构造产生了极其严重、刻和长远的影响。
The atmospheric pressure at the surface is only 1% of that on Earth.
在表面的大气压力只有1%的是地球上。
The atmospheric pressure at the surface is only 1% of that on Earth.
在表面的大气压力只有1%的是地球上。
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