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.

村舍在那片。

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

表层岩带位于风化壳表层上部，风化淋滤及表径流破碎，短距离搬运堆积于势相对较低风化壳表面，形成一些沟、洞、缝、蚀、蚀漏斗及落水洞等，其充填物主要为表残积物和洞壁塌积物。

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.

岩斜坡和岩为表水汇集区及下水排泄区，岩作用相对较弱，储层不发育。