我们必须立即行动，因为海洋的衰退是我们不能忽视的危机。

We have on this earth what makes life worth living.

The advantages found in history seem to be of three kinds， as they result either from the mere situation of the climate and country or from the form of government and of the character of the people， or from those finer principles and morals， which may be called the recommendations of philosophy.

Progress is impossible without change, and those who cannot change their minds cannot change anything.

世界上最伟大的事情是知道如何属于自己。