科学中的多样性对于带来不同的观点和想法至关重要。

"The more we learn, the more we realize how much we don't know."

You can tell whether a man is clever by his answers. You can tell whether a man is wise by his questions.

资本主义社会的自由始终与古希腊共和国大致相同：奴隶主的自由。

The sustainable development of the coal industry requires the coordinated efforts of policy, technology, and the market.