学习数学的最好方法就是做数学。
Every scientific discovery should be measured by its contribution to human welfare.
我对扮演弱女子不感兴趣。我对扮演坚强的女性感兴趣。
森林的真正价值不是用板英尺来衡量的,而是用生物多样性来衡量的。
The behaviorist asks: Why don't we make what we can observe the real field of psychology?