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賞析：形容人的身體如同枯木，心靈如同死灰，達到了一種超脫的境界，不再被外界的事物所干擾。

研究不僅僅是回答問題，還要提出正確的問題。

唯一真正的錯誤是我們從中什么也沒學到的錯誤。

The most effective economic organizations are those that are able to combine the efficiency of large-scale operations with the flexibility and innovation of small-scale ones.

"The only way to have a friend is to be one."

The best time to plant a tree was 20 years ago. The second-best time is now.

林業的未來在于平衡經濟需求與生態責任。