You have to be willing to work hard and stay focused on your goals.

无政府状态是战争的允许性原因；它创造了一个国家必须依靠自助来确保生存的环境。

The greatest power is the ability to control your own emotions and desires.

The concept of a black hole firewall challenges our understanding of quantum mechanics and general relativity.

犯罪小说是探索人类境况的完美载体。