1、地面塌陷
...fall into a (deep)depression 变得意志消沉，精神沮丧ground depression 地面塌陷secondary depression 副低压；副低气压 ...
2、面沉降
... ground cover 地被植物 ground depression 面沉降；地面塌陷 groundwater 地下水 ...
3、地表下沉
... ground borer 钻土机 ground depression 地表下沉 ground level 地面高度 ...
4、地面沉降
...La Nina phenomenon (气候)拉尼娜现象land subsidence; ground depression 地面沉降monsoon n. 季候风；（印度等地的）雨季, 季风 ...