改变是好的。改变就是进步。没有改变,一切都不会改善。
举一个例子尚且不明白,就不要追求见多识广。 
"The city never sleeps, and neither does its darkness."
最大的风险就是不冒任何风险。
The whole art of teaching is only the art of awakening the natural curiosity of young minds for the purpose of satisfying it afterwards.