洞腔系由围岩控构的空腔，是围合蚀空部分的实体。
研究区洞群洞腔发育受区域构造裂隙的控制，与地下水文网的关系密切；
The development of the caves is in close connection with underground drainage network;
银色的汞合金在牙科中被用于填充牙齿患病后残留的腔洞，合金包括液态的汞和粉末状的银、锡、铜、锌以及其他金属。
Dental amalgams, the silver-colored material used to fill teeth after removal of a cavity, include liquid mercury and a powder that contains silver, tin, copper, zinc, and other metals.
谁已非常尖锐的眼睛观察气体分子，并开辟了皮瓣每次当快速分子在左边的腔洞的办法。
Who has very sharp eyes observes the gas molecules and opens the flap every time when a quick molecule in the left chamber approaches the hole.
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