Mathematics is the art of giving the same name to different things.
数学是为不同事物赋予相同名称的艺术。
The best way to be happy is to make others happy.
可持续性不是一种选择,而是我们共同的责任。
如果购买普通股时工作做得正确,那么卖出它的时间几乎永远不会到来。
The time which we have at our disposal every day is elastic; the passions that we feel expand it, those that we inspire contract it; and habit fills up what remains.
"A book is a dream that you hold in your hands."