圆形凹陷;周期性抑郁
The Baisha meteorite-impacted crater is a circular rimmed depression with about 3. 5km in diameter in Hainan Island. The mountain range surrounding the crater is obviously continuous with a binary configuration composed of the lower and upper parts.
海南岛白沙陨击坑是一个直径约3.5km的环形镶边坳陷,组成陨击坑边缘的环形山连续性好,并具二元结构;
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