习惯的强度是其被强化次数的函数。
To be aware of the idea of social structure and to use it with sensibility is to be capable of tracing such linkages among a great variety of milieux.
人类是陆地动物，但也是海洋动物。
The good man is the man who， no matter how morally unworthy he has been， is moving to become better.
好人是那个，无论他以前有多么道德上不值得，都在努力变得更好的人。
"The only thing to do with good advice is to pass it on. It is never of any use to oneself."