地球历史上有很多尚未揭示的奥秘，例如距今约350 ~ 250万年前的全新世中期地球气候变化的根本原因一直都是个谜。
09051903 One of the mysteries of the Earth's history is the fundamental climate change in the Mid Pliocene, about 3.5-2.5 million years ago.
在回顾与反思“阜阳奶粉事件”基础上，本文揭示了这一事件产生的根本原因就在于地方保护主义。
On the basis of reviewing "milk power incident of Fuyang", this text has announced the basic reason emerging in this incident that lie in local protectionism.
通过比较方法和实证检验方法，揭示我国所面临的就业压力和失业问题的根本原因。
It is announced of the basic reasons of pressure on employment and problem of unemployment that our country faces through the comparative method and the method of inspection of real examples.
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