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

A good deed is never lost; he who sows courtesy reaps friendship, and he who plants kindness gathers love.

做好事永远不会失去;播下礼貌的,收获友谊;播下仁慈的,收获友爱。

There can be no defense like elaborate courtesy.

没有什么辩护能比得上精心准备的礼貌。