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The Moon’s surface is covered with craters overlain by a layer of soil called regolith. Nearly all the craters were formed by explosive impacts of high-velocity meteorites.
- crater [5kreitE] n. 环形山
- overlie [7EuvE5lai] v. 在. . . 上面
- regolith [5re^EliW] n. 风化层
- explosive [iks5plEusiv] adj. 爆炸(性)的
- impact [5impAkt] n. 冲击
- velocity [vE5lCsiti] n. 速率
- meteorite [5mi:tiErait] n. 陨星