Sustainable forestry is not an option; it's an obligation.

手书黄埔军官学校训词（中国国民党党歌词，中华民国国歌歌词）

可持续性不是一种选择；它是我们对下一代的责任。

The secret of all effective advertising is not the creation of new and tricky words and pictures, but one of putting familiar words and pictures into new relationships.

学习某样东西的最好方法就是把它教给别人。