He said that the world was made for men to fight in and that the worth of a thing was the worth of the fight for it.

Give the pupils something to do, not something to learn; and the doing is of such a nature as to demand thinking; learning naturally results.

过度捕捞是一个全球性挑战，需要全球解决方案和共同责任。

地质学是研究自然界有机和无机领域连续变化的科学。

阅读和解释遗传密码的能力彻底改变了我们对医学和遗传学的方法。

我不遵守规则，我制定规则。