Too much knowledge makes the head bald. 学问太多催人老。

Too much familiarity breeds contempt. 过分熟悉会使人互不服气。

Tomorrow never comes. 我生待明日，万事成蹉跎。

To know oneself is true progress. 人贵有自知之明。

To know everything is to know nothing. 什么都知道，一如什么都不知道。

To err is human. 人非圣贤，孰能无过。

Tit for tat is fair play. 人不犯我，我不犯人；人若犯我，我必犯人。

Time tries all. 路遥知马力，日久见人心。

Time past cannot be called back again. 时间不能倒流。

Time lost cannot be won again. 时光流逝，不可复得。