近期美国一支15人的探险队在中国重庆市附近发现了一个新洞穴，其内部可视度极低，烟雾袅绕如同云层一般。近期美国一支15人的探险队在中国重庆市附近发现了一个新洞穴，其内部可视度极低，烟雾袅绕如同云层一般。
A 15-member team of expert cavers and photographers dicovered a cave wonder in Chongqing, a major city in Southwest China. The cave is so huge that it has its own weather system with thick cloud and fogs. [China.org.cn]