美国宇航局利用从地球上空数百英里收集的数千份“卫星观测资料”制作了一系列漂亮的照片。
The space agency produced the stunning series images using thousands of “satellite-based observations” hundreds of miles above the planet
环绕地球运行的卫星，为科学家提供了浩如烟海的外层空间的资料，相比之下，对地球内部的结构则知之甚微。
Satellites orbiting round the earth have provided scientists with a vast amount of information about conditions in outer space.
环绕地球运行的人造卫星为科学家们提供了大量有关外层空间情况的资料。
Satellites orbiting round the earth have provided scientists with a vast amount of information about conditions in outer space.
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