夜幕降临的时候我参观了这个陨石坑，我深深地明白，太阳系的碎片随时可能侵入我们舒适的地球和月球构成的环境。
I visited the crater as night fell, and I felt keenly aware that fragments of the solar system can invade our cozy realm of Earth and Moon.
关于月亮构成的数据，比如它含有多少冰和其他宝藏，有助于中国决定未来的月球基地计划是否可行。
Data about the moon's composition, such as how much ice and other treasures it contains, could help China decide whether its plans for a future lunar base are practical.
我们预料，但是我们不能确定，月球有一个由熔岩构成的地核，如同地球。
We think-but we are not sure-that the moon has a center core which includes molten rock, as the earth does.
一旦发现某个星体构成与地球或月球碰撞的威胁，月球制造的宇宙火箭即使其改变轨道以解除威胁。
Those objects that once presented a threat of collision with the Earth or the Moon will have had their orbits altered by Moon-constructed spacecraft.
月球宇宙无线电波阵列(LARC)由数百个小型射电天文望远镜构成，它们将在月球暗面覆盖两平方公里。
The Lunar Array for Radio Cosmology (LARC) would involve hundreds of small radio telescopes covering two square kilometers on the side of the moon that never faces Earth.
这是悲哀但真实的事实：月球并不是由奶酪构成的。
发问者：根据从月球上取回的碎片，就可以知道月球的构成。
Questioner: Pieces are brought back from the moon in order to understand the composition of the moon.
阿伦回忆说，“我们一点都不知道月球是由什么构成的”。
早期的月球大部分是熔浆构成的液体装球体，表面覆盖着一层较轻矿物组成的薄壳。
The early Moon developed as a mostly liquid ball of magma covered with a thin crust of lighter minerals.
我们预料，但是我们不能确定，月球有一个由熔岩构成的地核，如同地球。
We think — but we are not sure — that the moon has a center core which includes molten rock, as the earth does.
力拓矿业集团的巨大的露天挖掘煤矿构成了宛如仙境又貌似月球的风景。
The giant opencast mines of Rio Tinto create a surreal, almost lunar landscape.
此外，两艘月球轨道船证实了月球高地主要由斜长岩(一种主要由长石形成的火成岩，富含钙和铝)构成。
Furthermore the lunar orbiters confirmed that the highlands of the moon are dominated by anorthosite an igneous rock composed primarily of the mineral feldspar and rich in calcium and aluminum.
科学家一直认为，月球上如果存在水，那应该是过去数十亿年中由冰构成的彗星坠落在月球所沉积下来的。
If there is water, it would probably have been deposited when comets, which are comprised largely of ice, collided with the moon over billions of years.
月球是由什么构成的？
然而，所有这些东西，看上去虽不同，但却有一个共同点，它们全都由微粒构成的，包括地球上、月球上、太阳及所有恒星中的物质。
Yet all these things, different as they seem, have one thing in common. All of them are made up of small particles. Even the earth, the moon, the sun, and all stars are no exceptions.
月球是由什么构成的？
月球是由什么构成的？
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