圆形洼地的英文

circular depression

crater

• 圆形:    circular; round
• 洼地:    marsh land; depres ...
• u形洼地:    oxbow shaped depre ...

例句与用法

1. The maria are circular depressions covered with dark, loosely packed material-not solid rock .
   “月海”是圆形洼地，覆盖着暗色的松散物质，而不是坚硬的岩石。