每个物种都有其独特的价值和生存意义。
The great epochs of our life are the occasions when we gain the courage to rebaptize our badness as the best in us.
Any change, even a change for the better, is always accompanied by drawbacks and discomforts.
数学的研究就像空气或重力——它无处不在,你看不到它,但你知道它在那里。