| 释义 |
sink·hole AHD[sĭngkʹhōl'] D.J.[ˈsɪŋkˌhəʊl]K.K.[ˈsɪŋkˌhol]n.（名词）- A natural depression in a land surface communicating with a subterranean passage, generally occurring in limestone regions and formed by solution or by collapse of a cavern roof.灰岩坑：与某一地下通道相联的陆地表面的自然下沉地区，通常出现在灰岩地区并且由石灰岩溶解成溶洞顶部下沉形成
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