Be nice to your children because they are going to choose your nursing home.
对你的孩子好一点，因为他们未来会给你选养老院。
出自《海国图志序》。善于学习外国的长处，就能够征服外国;不善于学习外国的长处就会被外国所征服。
The concept of computational efficiency is central to the design of learning algorithms.
墙不会倒下。