我相信儿童书籍应该是美丽的物品，值得珍藏和反复阅读。

合作是解决科学领域最大挑战的关键。

如果你不改变自己，就会被别人改变。

As you grow older, you will discover that you have two hands, one for helping yourself, the other for helping others.

成功的真正标准是为子孙后代留下积极的遗产。