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Recent orbital images show that water might still occasionally flow on the surface of Mars.
最近的轨道照片显示水仍然偶尔流过火星表面。
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To pin down the size of an orbital, we take a contour surface.
为束缚住轨道的大小，我们取一等值面。
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To pin down the size of an orbital, we take a contour surface.
为束缚住轨道的大小，我们取一等值面。
youdao