The concept of legal validity is crucial for understanding the nature of law.

最重要的是唤醒孩子自己的意志和创造能力。

【释义】走一百里路，走了九十里才算是一半。

我最好的地方就是我不是你。

A good algorithm is like a sharp knife—it does exactly what it is supposed to do with a minimum of effort.