爱情是心中的一个洞。
The division of labor in manufacturing is the great principle by which we gain advantage over other nations.
市场是人类创造物，和所有人类创造物一样，它们可以被改进。
有时候一整天中最重要的事情就是我们在两次深呼吸之间的休息。
The structure of DNA was not just a discovery; it was a revolution in biology.
