勤奋的人是时间的主人，懒惰的人是时间的奴隶 朝鲜
在科学上没有平坦的大道
Expreience keeps a dear school, yet fools will learn in no other. (Benjamin Franklin, Americna president)
All is but lip-wisdom that wants experience. (Philip Sideney, British satesman)
Experience is not interesting till it begins to repeat itself, in fact, till it does that ,it hardly is experience. (Elizabeth Bowen, British novelist)