词汇	collapse sink
释义	collapse sink 塌陷落水洞
随便看	single attract single attribute single attribute assessment single attribute method single attribute multiple value query structure single-attribute search single attribute transformation single auction price Single Audio System single auger single-auger unloader single-author single autoflare single automatic operation single-automatic operation single auxiliary leaf single auxiliary view single avitaminosis Single avitaminosis single A V valve single A-V valve single axial direction control single axial mode operation single-axial mode operation single-axial rotation