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.
The future of coal lies in clean and efficient utilization.
我思故我在。
一年中的夜晚与白天数量相同、持续时间一样长。即使快乐的生活也有其阴暗笔触，没有“悲哀”提供平衡，“愉快”一词就会失去意义。耐心镇静地接受世事变迁，是最好的处事之道。
The strictness of Russian laws is mitigated by the non-obligation to fulfill them.
In the part of this universe that we know there is great injustice， and often the good suffer， and often the wicked prosper， and one hardly knows which of those is the more annoying.
处理一个不自由的世界的唯一方法是变得如此绝对自由，以至于你的存在本身就是一种反叛。
The great thing about fiction is that it makes everything interesting.
