Don't interfere with anything in the Constitution. That must be maintained, for it is the only safeguard of our liberties. And not to Democrats alone do I make this appeal, but to all who love these great and true principles.

There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement. If the result is contrary to the hypothesis, then you've made a discovery.

One must not lose desires. They are mighty stimulants to creativeness, to love, and to long life.

广告的目的是销售。这是唯一的目的。

工程事业必须学术和经验相辅相成，仅靠空谈绝对难以胜任。