我们对明天认识的唯一限制是我们今天的怀疑。
The only limit to our realization of tomorrow is our doubts of today.
可持续林业不是成本,而是我们拥有的最明智的长期商业策略。
No arts; no letters; no society; and which is worst of all, continual fear, and danger of violent death; and the life of man, solitary, poor, nasty, brutish, and short.