We thought we had such problems. How were we to know we were happy?

坚持非常重要。你不应该放弃，除非你被迫放弃。

The function of entrepreneurs is to reform or revolutionize the pattern of production by exploiting an invention or, more generally, an untried technological possibility for producing a new commodity or producing an old one in a new way.

关于一个人的真相，往往藏在他们试图隐藏的东西里。