Hope for the best, prepare for the worst. 抱最好的希望，做最坏的打算。
Absence makes the heart grow fonder. 距离产生美。
A watched pot never boils. 心急吃不了热豆腐。
There is no time like the present. 机不可失，时不再来。
Experience must be bought. 吃一堑，长一智。
Make hay while the sun shines. 良机勿失。
He who does not advance loses ground. 逆水行舟，不进则退。
