peripheral depression

• 边缘洼地

peripheral depression的用法和样例：

例句

1. We were hobbled through the rugged depression.
   我们深一脚浅一脚地穿过了那块高低不平的洼地。
2. Erodible soil fractions are usually dislodged from projections and trapped in depression.
   可冲蚀土壤部分经常从凸出物剥蚀并降落于洼地。