太阳系内的行星又是由什么组成的？
我们所画的图是在xy坐标系内的，在这里我们可以。
Well, we had here a picture in xy coordinates where we had our sides.
具有如此低谷的陨石坑在我们太阳系内还从未发现过。
A crater with such troughs has never been seen before anywhere in our Solar System.
头巾式女帽一种妇女戴的无边贴发帽，系在一顶小内帽周围，缠上其它材料制成。
A woman's close-fitting hat that consists of material wound around a small inner cap.
头巾式女帽一种妇女戴的无边贴发帽，系在一顶小内帽周围，缠上其它材料制成。
A woman's close-fitting hat that consists of material wound around a small inner cap.
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