说某事就是执行一项行动，而执行行动就是用言辞来实现某事。
To say something is to perform an action， and to perform an action is to do something with words.
Responsible forestry is not a choice, it's an obligation for all of us.《Forests of Tomorrow》
万物皆由四要素组成：地、水、火、气。
Man will not merely endure: he will prevail.
实现明天的唯一限制将是我们今天的疑虑。