Remember, if you ever need a helping hand, you'll find them at the end of each of your arms. As you grow older, you will discover that you have two hands, one for helping yourself, the other for helping others.

Every tree we plant today is an investment in a greener, healthier tomorrow.

为全人类提供食物的战斗已经结束。为未来全人类提供食物的战斗才刚刚开始。

缓慢的程度与记忆的强度成正比；速度的程度与遗忘的强度成正比。