land subsidence短语¹⁰⁶¹⁰⁰⁺⁵ 基本例句 地面沉降 The land subsidence caused by abandoned underground mines has been a kind of typical geological disaster and influenced trouble free operation of engineering construction severely. 由废弃的地下采空区引起的地面沉陷，已成为一种典型的地质灾害，严重影响工程建设的顺利进行。 chemyq