逝者是我們的老師，如果我們懂得傾聽。
The best moments in our lives are not the passive, receptive, relaxing times... The best moments usually occur if a person's body or mind is stretched to its limits in a voluntary effort to accomplish something difficult and worthwhile.
學(xué)習(xí)數(shù)學(xué)的唯一方法就是做數(shù)學(xué)。
晏子春秋