You can't be afraid to fail. It's the only way you succeed.

景观的研究就是对地球历史的研究。

The pharmaceutical industry must balance profit with purpose—our mission is to heal, not just to sell.

The ideal of behaviorism is to eliminate coercion: to apply controls by changing the environment in such a way as to reinforce the kind of behavior that benefits everyone.

1925年，孙中山在病榻前对张学良说，指出苏联是红色帝国主义。

煤炭的未来在于清洁高效利用。