法律体系是根据其自身的有效性标准而有效的规则体系。
A legal system is a system of rules which are valid according to the system's own criteria of validity.
生命短暂,珍惜每一刻。
The night is a great mirror, but the stars are its reflections.
程序最重要的属性是它是否实现了用户的意图。
Use songs to warm every heart in need.