经济学家的角色既是科学家，又是工程师。

煤炭的未来在于可持续和负责任的采矿实践。

The world is full of people whose notion of a satisfactory future is, in fact, a return to the idealised past.

The past is not dead; it is not even past.

The best way to predict the future is to create it.

We are all born with a certain degree of talent. What we do with it is up to us.

为：同“伪”。“务为”即作假。盖：遮盖。虚：虚假。弄虚作假．时间不会太久；遮盖虚假的事情，时间也不会太长。