次要规则是那些规定主要规则的创建、修改和废止的规则。
The secondary rules are those that provide for the creation, alteration, and extinction of primary rules.
Sustainability isn't an option; it's a responsibility we owe to future generations.
Be thankful for what you have; you’ll end up having more. If you concentrate on what you don’t have, you will never, ever have enough.
你能给别人的最大礼物就是你的时间，因为你给了他们永远无法收回的东西。
负责任的林业不是一种选择，而是我们所有人的义务。