求翻译：内因是岩溶形成的必要条件，也指影响着岩溶塌陷的环境因素。常常包括以下几方面：水文地质条件、覆盖层特征、岩溶发育程度、地质构造等是什么意思？

Internal karst formation of the necessary conditions that affect the environmental factors of karst collapse. Often include the following areas: hydrogeological conditions, overburden characteristics, the degree of karst development, geological structure, etc.

It is redeeming the sine qua non for karst formation, it also refers to the impact of environmental factors karst collapse. often include the following aspects: (BGR) coating characteristics, developmental level, lava, geological formations, etc.

The internal cause is the essential condition which the karst forms, also refers is affecting the karst collapse environmental factor.Includes following several aspects frequently: Hydrogeological conditions, overburden layer characteristic, karst growth degree, geologic structure and so on

Internal is the sine qua non of karst formation, also means the environmental factors of karst collapse. Often includes the following areas: hydro-geological conditions, covering layer characteristics, degree of Karst, geological structure

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