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It's so much darker when a light goes out than it would have been if it had never shone.

Nature is a book, and each species is a chapter, each species is a story.

For those who live for a reason, every moment is a new opportunity.

語出漢·桓寬《鹽鐵論·毀學》。壞話不說，壞事不干，可謂潔身自好。

合作是解決復雜問題的關鍵。