1.It is never too old to learn.
活到老，学到老。

2.Learn and live.
活着，为了学习。

3.Fire is a good servant but a bad master.
火是一把双刃剑。

4.Misfortunes never come alone/single.
祸不单行。

5.All time is no time when it is past.
机不可失，时不再来。

6.Opportunity cannot be lost, time never comes again.
机不可失，时不再来。

7.Fortune favors those who use their judgement.
机遇偏爱善断之人。

8.A leopard cannot change its spots.
积习难改。

9.Four eyes see more than two.
集思广益。

10.Do as you would be done by.
己所不欲，勿施于人。

11.Do as you would be done by.
己所不欲，勿施于人。

12.Envy has no holidays.
忌妒之人无宁日。

13.Let bygones be bygones.
既往不咎。

14.Success belongs to the persevering.
坚持就是胜利。

15.Hear all parties.
兼听则明。

16.Health is happiness.
健康就是幸福。

17.Health is better than wealth.
健康胜过财富。

18.Good health is over wealth.
健康是最大的财富。

19.A sound mind in a sound body.
健全的精神寓于健康的身体。

20.A fox may grow gray, but never good.
江山易改，本性难移。