我们最喜欢的持有期是永远。
解释：狐狸疑心大，刚埋下东西，旋即又把它挖出来。
Remember, if you ever need a helping hand, you'll find them at the end of each of your arms. As you grow older, you will discover that you have two hands, one for helping yourself, the other for helping others.
不仅仅是广告，产品本身也必须有趣。
朗兰兹纲领是所有数学学科相互关联性的反映。
The art of progress is to preserve order amid change and to preserve change amid order.