自然必须被遵循，才能被掌控。
Nature， to be commanded， must be obeyed.
When stocks are attractive, you buy them. Sure, they can go lower. I've bought stocks at $12 that went to $2, but then they later went to $30. You just don't know when you can catch the bottom.
技术积累是一个长期过程，不能急功近利。
林业的未来属于那些将树木视为生命系统而不仅仅是立木库存的人。