The future of energy lies in diversification and adaptability.

The security dilemma is a fundamental feature of international politics, as states' efforts to increase their own security often decrease the security of others.

每个生命都包含自己的奥秘，传记作者必须尊重那些不可知的部分。

Mathematics knows no races or geographic boundaries; for mathematics, the cultural world is one country.

你总统领导不了是因为我。

真正的生活方式是回应自己的需求。