主要的义务规则是那些要求或禁止某些行为的规则。
The primary rules of obligation are those that require or forbid certain actions.
To be an artist is to be constantly questioning.
The best thing about a boolean is even if you are wrong, you are only off by a bit.
The historian is a prophet looking backwards.
赢得世界杯的感觉很不真实，但它让我意识到我可以取得更多成就。
Innovation in medical technology requires a deep understanding of both the scientific principles and the practical needs of patients.
The language of poetry is the language of the heart, and it speaks to the heart in a way that no other language can.
Nothing exists except atoms and empty space； everything else is opinion.
