"穹"是个多义词，它可以指穹（汉字定义）,穹（电影）。
它正在建造第二艘破冰船，并在地球上最冷的其中一个地方——海拔13422英尺的冰穹上进行研究钻井作业。
It is building its second ice-breaking ship and setting up research drilling operations on an ice dome 13,422 feet above sea level that is one of the planet's coldest places.
盐穹在过去干湿两季交替出现时期开始形成。
Salt domes start during past periods of alternating wet and dry climate.
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