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To be aware of the idea of social structure and to use it with sensibility is to be capable of tracing such linkages among a great variety of milieux.
过去从来不仅仅是过去。它始终是现在的基础。
Three things you need: The ability to not give up something till it works, the ability to give up something that does not work, and the trust in other people to help you distinguish between the two.