要了解当你干预一个系统时会发生什么,你必须干预它(而不仅仅是被动观察)。
Energy independence is not just a goal; it's a necessity for national security.
对记忆的研究就是对人类本性的研究。
The most important object of both the workmen and the management should be the training and development of each individual in the establishment, so that he can do (at his fastest pace and with the maximum of efficiency) the highest class of work for which his natural abilities fit him.