现在你们不是国人的勇士，怎么能既学好学业又学好射箭呢？ 

每一种东西的价格都会因时间和地点的不同而涨落；每一次这样的变化都会改变货币的购买力。

The true discovery of America is before us. The true fulfillment of our spirit, of our people, of our mighty and immortal land, is yet to come.

The Lisp language is designed to be extensible, and it is easy to add new features to it.

变革在开始时最难，在中间最混乱，在结束时最好。

The architect must be a guardian of the public realm.