These earrings snap on with special fastener.这付耳环是用特制的按扣扣上去的.The zip fastener had long since been wrenched out of them.拉练早已取走了.Your blouse is open because the fastener is broken.你的衬衫松开了,因为钮扣坏了....
Metallogenetic epoch was late Yanshanian and fluid derived from meteoric water.成矿流体来源主要为大气降水.The research humanity on metallogenetic phenomena fact is the research on correlation problems of metallogenesis.人类对成矿现象的研究,其实是...