所以,即使做很困难的事情,也一定能够达到目的,没听说过想达到自己的愿望,而能回避困难的。 
关于幸福,你只有在失去它的时候才知道你曾经拥有过。
The future of petrochemicals lies in sustainability and efficiency.
Poetry must always have a moral purpose; it should instruct while it delights.