Yesterday will not be called again.昨日不复来。
Wit once bought is worth twice taught.由经验而得的智慧，胜于学习而得的智慧；一次亲身的体会，胜过两次的教师教导。
Tomorrow comes never.切莫依赖明天。
Time tries all.时间检验一切。
Time past cannot be called back again.光阴一去不复返。
Time and tide wait for no man岁月无情；岁月易逝；岁月不待人。
The morning sun never lasts a day.好景不常；朝阳不能光照全日。
The future is in my hands. It’s totally up to me.我的未来我作主。
Seeing is believing.百闻不如一见。
put everything in its proper use 凡事都应用得其所 。