分组和组织的过程不是任意的,而是遵循明确的规律
The process of grouping, of organization, is not arbitrary but follows definite laws.
Nothing is funnier than unhappiness.
The widespread adoption of drones will bring an efficiency revolution.
在数学中,提出问题的艺术必须比解决问题更有价值。
法国只有在伟大时才是法国。
语言是存在的家园。