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Biology will relate every human gene to the genes of other animals and bacteria, to this great chain of being.
We cannot always assure the future of our friends, but we have a better chance of assuring our future if we remember who our friends are.
一个人懒惰又奢侈,生活就会贫困;勤劳而节俭,生活就会富足。
人们之所以加入社会是为了保护他们的财产。