The existence of a legal system is a matter of social fact.
法律体系的存在是一个社会事实。
真正的企业家精神在于不断挑战现状,寻找新的机会。
The greatest events are not always the most important.
The most profound discoveries in mathematics often come from questioning the most basic assumptions.
数学中最深刻的发现往往来自于对最基本假设的质疑。
最好的儿童书籍是那些尊重孩子智力的书籍。