你说我当你一回女儿，连让你高兴一次都没做过。

The first fruit of this imagination - and the first lesson of the social science that embodies it - is the idea that the individual can understand his own experience and gauge his own fate only by locating himself within his period, that he can know his own chances in life only by becoming aware of those of all individuals in his circumstances.

改变始于一小步，但需要集体的努力才能使其持久。

科学家最重要的品质是坚持。

你知道得越多，你就越意识到你不知道的越多。