To say something is to perform an action， and to perform an action is to do something with words.

每个角色都是一个世界，而每个世界都是一个疑问。

Quality is the lifeline of an enterprise, we must hold ourselves to the highest standards.

文学的衰落表明一个民族的衰落。这两者走下坡路的时候是齐头并进的。

The discovery of neutrino oscillations was a turning point in our understanding of particle physics.

生活中最重要的事情不是胜利，而是奋斗。

我在未完成的事物中发现美。