海洋的资源并非无限；我们必须以智慧和克制来养殖这些资源。

What other dungeon is so dark as one's own heart! What jailer so inexorable as one's self!

The writer must be a defender of freedom, even at the cost of his own comfort.

I don't compete with anyone but myself. My goal is to be better than I was yesterday.

20多岁时，人格的变化比人生中任何其他时期都要大。

天下都变成了秋天的气象，一个房间难以维持春天的温暖。