"Every child deserves to see themselves in a book."

The future of liberal democracy depends on its ability to adapt to new challenges and to maintain the support of its citizens.

解释：明智的人不违背时机而放弃有利的行动，勇士不回避死亡而埋没名声，忠臣不先顾及自己后顾及国君。

如果没有地幔对流的概念，大陆漂移理论将只是一种猜测。