collapse land地: the earth坍陷: caving; coefficient of collapsibility, δs; coefficient of sttlement; collapse; give; mining subsidence; sloughing凹陷地: hollowly坍陷落: caving坍陷锥: slumcone下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:坍陷地，即可在微信中查询翻译
