If you're horrible to me, I'm going to write a song about it, and it won't be a nice one.
数学家的工作永远不会完成;总有新的问题需要探索,新的谜团需要揭开。
书籍可以是镜子、窗户和滑动玻璃门。
孔子说:“有益的爱好有三种,有害的爱好有三种。爱好礼乐、爱好称赞别人的优点,爱好广结善友,有益处;爱好放荡、爱好闲逛、爱好大吃大喝,有害处。”
Profit and sustainability must go hand in hand; one cannot exist without the other.