规模和价值效应在不同市场和时间段普遍存在,但其幅度可能有显著差异。
I'm not perfect and I don't pretend to be.
写作是一种自由行为,而自由对那些想要控制思想的人来说总是危险的。
A mathematician's work is never done; there are always new questions to ask and new mysteries to solve.