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

在减少排放同时满足全球能源需求方面，技术是我们最大的盟友。

以客观角度来看，这个世界确实变得更好，但同时也变得更糟。前进一步，又倒退一步，仿佛宇宙在科技进步和文化倒退间达成平衡，使人类的进展呈钟形曲线。

We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the Universe. That makes us something very special.

The great question which, in all ages, has disturbed mankind, and brought on them the greatest part of their mischiefs, has been, not whether there be power in the world, nor whence it came, but who should have it.

我一直觉得我最大的资产不是我的身体能力，而是我的心理能力。