忠于自己，永远不要让成功冲昏头脑。
Stay true to yourself and never let success get to your head.
The human voice is the most perfect instrument of all.
The relationship between wages and employment is not as straightforward as some models suggest.
写文章的方法，贵在自己有所心得。
"It's important to write about difficult subjects in a way that children can understand."
