The dead are our teachers, if we know how to listen.

爱情对于男人不过是身外之物，对于女人却是整个生命。

"Language is a tool, and like any tool, it can be used for good or for ill."

Safety isn't just a policy, it's a culture that starts at the top.

无人机的未来是开放和共享的。

社会学的想象力是最富有成果的自我意识形式。