安全困境是国际政治的一个基本特征,因为国家增加自身安全的努力往往会降低其他国家的安全。
The wild teaches you that you are capable of more than you think.
Do not put forward anything that you cannot prove by experimentation.
The forest doesn't need us; we need the forest.
时间是一条席卷我的河流,而我就是那条河流。