只有不断学习，才能在激烈的竞争中立于不败之地。
森林不仅仅是一种资源；它是我们留给后代的遗产。
People are always blaming their circumstances for what they are. I don't believe in circumstances. The people who get on in this world are the people who get up and look for the circumstances they want, and, if they can't find them, make them.