要给儿童提供一个使他们得到满足的环境，必须努力了解儿童的需要。
In business, as in life, integrity is the only currency that never loses value.
Sometimes we get sad about things and we don’t like to tell other people that we are sad about them.
有时我们会为某些事情感到悲伤，而我们不愿意告诉别人我们为此感到悲伤。