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.
"I'm not trying to follow trends. I'm just trying to make music that feels good."
Every tree planted today is a legacy for tomorrow's generations.
"The pursuit of knowledge is a journey that never ends, filled with challenges and triumphs."
可持续成功的关键在于平衡利润与目标。
Moderation is a fatal thing. Nothing succeeds like excess.
过去总是对现在的斥责。