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Rent is that portion of the produce of the earth which is paid to the landlord for the use of the original and indestructible powers of the soil.

NP中的每個(gè)問題都可以歸約為可滿足性問題，這是計(jì)算復(fù)雜性理論的基石。

Acknowledging what you don't know is the dawning of wisdom.