Never close your lips to those whom you have already opened your heart.

可持续性不是一种选择；它是我们对后代的责任。

宁可让儿童一个字也不识，也不要使他为了学到这一些学问而把其他有用的东西都牺牲了。

The world is full of obvious things which nobody by any chance ever observes.

文章是用来阐明道理的。

真相是一把刀，它两面都割。