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States are rational actors that seek to maximize their relative power in order to ensure their survival in a competitive international system.

There is no death, daughter. People die only when we forget them.

The universe is not only stranger than we imagine, it is stranger than we can imagine.

我不遵循任何特定的理論，我只做我認(rèn)為正確的事。

當(dāng)你悲傷的時候，就會喜歡看落日。