The volcanic type uranium deposits in East China basically occur in Jurassic and Cretaceous systems.
我国东部火山岩型铀矿床基本上都产在侏罗、白垩系中。
A third type of mountain may be formed as a result of volcanic activity which occurs in regions of active fold mountain belts, such as in the Cascade Range of western North America.
第三种类型的山可能是由于火山活动形成的，一般发生在活动性褶皱带地区，如北美西部的喀斯喀特山脉。
For the most likely type of volcanic eruption in Yellowstone, everywhere would be safe except in the immediate vicinity of the advancing lava flow.
在黄石火山爆发最有可能的类型，到处是安全，除非在推进熔岩流附近。
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