结束于早白垩纪（一亿二千万年）。
The volcanic actions ended in the early Cretaceous, 120 million years before present.
此时中国人口已逾一亿二千万，远超过欧洲诸国人口的总和。
And China's population of some 120 million was far larger than that of all the European countries combined.
此时中国人口已逾一亿二千万，远超过欧洲诸国人口的总和。
And China's population of some 120 million was far larger than that of all the European countries combined.
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