我是一个冒险者，我喜欢挑战自己。

The modern state is characterized by its ability to concentrate and use power effectively.

The anarchic nature of the international system compels states to prioritize their own survival above all else.

心理活动是有机体与世界互动的方式。

世界是一本伟大的书，那些从未离开家的人只读了一页。