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.
O sonho é o que nos faz caminhar, mesmo quando tudo parece perdido.
The world is full of small pleasures; the trick is to find them.
大屠杀不是你能描述的东西，它是你只能幸存的东西。