有的鸟终究是关不住的,因为他们的羽翼太过光辉,当他们飞走时,你会由衷的祝贺他们获享自由;然而无奈的是:你得继续在这无聊之地苟且偷生。
弦理论的景观是广阔而复杂的,可能有10^500个不同的可能宇宙。
最好的投资是那些能让事情发生的人。
Natural experiments are a powerful tool for understanding causal relationships in the real world.
The most significant threat to liberal democracy today is not from the outside, but from within.