The state, therefore, has not existed from all eternity. There have been societies that did without it, that had no notion of the state or state power. At a certain stage of economic development, which was necessarily bound up with the split of society into classes, the state became a necessity.

在数学的世界里，每个问题都会引出另一个问题，创造出一个连接所有科学领域的无尽知识网络。

如果我们现在不采取行动，过度捕捞将成为我们的孩子要偿还的债务。

最好的想法往往来自不同学科的交叉点。

吴越两国相互谋划计策繁多，浣纱的神女也前去参与调和

Over one's mind and over one's body the individual is sovereign.

"I don't believe in happy endings."

那些将环境挑战视为创新机会的公司将会蓬勃发展。