The question is not whether the thing exists, but whether it has any essence which is capable of existence without us.
货币政策中的时间不一致性问题出现在政策制定者一旦经济主体形成预期后,就有动机偏离他们宣布的政策。
The transformation of the coal industry must rely on technological leadership, and green development is the only way forward.
The minerals we extract today must serve the needs of future generations as well.