洼地

The torrential rain may flood the low-lying land out.

这场骤雨有可能把低淹没。

The cottage is in that hollow.

村舍在那。

Hypergenesis palaeokarst usually manifests distinct vertical zoning rule which divides into epikarst zone, vadose zone and phreatic zone.

表层岩溶带位于风化壳表层上部，风化淋滤及表径流改造而破碎，短距离搬运堆于势相对较低风化壳表面，形成一些溶沟、溶洞、溶缝、溶蚀、溶蚀漏斗及落水洞等，其充填主要为表残和洞壁。

The karst depression belongs to the accumulative area of surface water and subdrainage area of subsurface water, the karstification is relatively week, and reservoirs are undeveloped.

岩溶斜坡和岩溶为表水汇集区及下水排泄区，岩溶作用相对较弱，储层不发育。