No one can call back yesterday；Yesterday will not be called again.

　　昨日不复来。

　　Tomorrow comes never.

　　切莫依赖明天。

　　One today is worth two tomorrows.

　　一个今天胜似两个明天。

　　The morning sun never lasts a day.

　　好景不常；朝阳不能光照全日。

　　Christmas comes but once a year.

　　圣诞一年只一度。

　　Pleasant hours fly past.

　　快乐时光去如飞。

　　Happiness takes no account of time.

　　欢娱不惜时光逝。

　　Time tames the strongest grief.

　　时间能缓和极度的悲痛。

　　The day is short but the work is much.

　　工作多，光阴迫。

　　Never deter till tomorrow that which you can do today.

　　今日事须今日毕，切勿拖延到明天。

　　Have you somewhat to do tomorrow，do it today.

　　明天如有事，今天就去做。

　　To him that does everything in its proper time，one day is worth three.

　　事事及时做，一日胜三日。

　　To save time is to lengthen life.

　　节省时间就是延长生命。

　　Everything has its time and that time must be watched.

　　万物皆有时，时来不可失。

　　Take time when time cometh，lest time steal away.

　　时来必须要趁时，不然时去无声息。