Courtesy on one side only never lasts for long.

单方面的礼貌永远不会持久。

相关名言

Courtesy is appropriate for gentlemen and necessary for thieves.

礼貌对绅士是适当的,对小偷是必要的。

Courtesy is as much a mark of a gentleman as courage.

礼貌和勇气一样是绅士的标志。