An eclipse happens when the earth and moon are in line with the sun.
地球和月亮与太阳处在一条直线上，日食就发生了。
Luna 16 landed on the lunar surface (in total darkness, no less), collected moon rocks, packed them up, and returned them to Earth.
“月球16号”降落在月球表面(完全是在黑暗中)，收集了月球岩石，打包，然后带回地球。
The lunar network will support high definition streaming of video and data between the moon and earth.
月球网络将支持月球和地球之间的高清视频和数据流。
From Earth, we can only see one side of the moon.
从地球上，我们只能看到月球的一面。
NASA plans for most of its future Earth-escaping payloads (to the moon and Mars especially) to carry Cube Sats.
NASA计划以其未来大部分逃离地球的载荷（特别是前往月球和火星的）来运载立方体卫星。
They can attain more distant orbits; NASA plans for most of its future earth escaping payloads (to the moon and Mars especially) to carry CubeSats.
它们可以到达更远的轨道；美国国家航空航天局计划在其未来的大部分发射任务（尤其是去月球和火星的）中携带立方体卫星。
The moon is a satellite of earth.
月球是地球的卫星。
The moon exerts a force on the earth.
月球对地球有引力。
The moon exerts a force on the earth that causes the tides.
月球对地球的吸引力引起潮汐。
The moon rolls about the earth.
月亮绕地球运行。
Is the earth heavier than the moon?
地球比月球更重吗？
The Earth-Moon system has always been perplexing.
地月系统一直令人困惑。
Our geography teacher told us the moon circles the earth every 28 days.
我们的地理老师告诉我们月亮每28天绕地球一周。
I hear Chang'e-5 brought some samples from the Moon to the Earth last year.
我听说去年嫦娥五号从月球带回了一些样本到地球。
If it is true, the mantle rocks of the Moon and the Earth should be the same geochemically.
如果这是真的，月球和地球的地幔岩石从地球化学上来看应该是相同的。
According to the giant-impact hypothesis, the Moon was created during a collision between Earth and a large object about the size of Mars.
根据“巨型撞击假说”，月球是在地球和一个火星大小的物体相撞时形成的。
The Queqiao satellite will form a communication bridge between controllers on Earth and the far side of the Moon.
鹊桥卫星将在地球的控制器和月球背面之间形成一座通信桥梁。
This similarity in density has long prompted speculation that the Moon split away from a rapidly rotating Earth, but this idea founders on two observations.
长期以来，这种密度上的相似性促使人们猜测月球是从快速旋转的地球上分裂出来的，但这种想法创始于两次观测。
Such a titanic collision between Earth and a Mars-size impactor may have given rise to Earth's Moon.
地球和火星大小的撞击物发生如此巨大的碰撞，可能导致了月球的形成。
The moon's gravity is a sixth as strong as the earth's, so Chang'e-4's experiment was a test: would the earth plants know which way was up on the moon?
月球的引力是地球引力的六分之一，所以嫦娥四号的实验是一个测试：地球上的植物能知道月球上哪个是向上的方向吗？
This is the unknown face of the moon that is always looking away from us, so we never see it from down here on the earth.
月球未知的一面总是远离我们，所以我们从地球上永远看不到它。
The success has also made Chang'e-5 the first spacecraft to bring back samples from the moon since 1976 when a Russian spaceship brought back 170.1 grams of samples to the earth.
这一成功也使嫦娥五号成为自1976年俄罗斯飞船将170.1克样本带回地球以来，第一个从月球带回样本的航天器。
Because the moon's body blocks direct radio communication with a probe, China first had to put a satellite in orbit above the moon in a spot where it could send signals to the spacecraft and to Earth.
由于月球阻碍了与探测器的直接无线电通信，中国首先必须把一颗人造卫星送入月球轨道上的一个点，人造卫星可以从那里向航天器和地球发射信号。
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