短語(yǔ)詞組短語(yǔ)cavern lake 巖洞湖circular cavern 圓形硐室cavern support 洞室支護(hù)cavern group 洞室群cavern type 洞型cavern survey 巖溶測(cè)量large cavern 大型地下洞室core cavern 堆芯洞穴 返回 cavern