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舌頭如利刀，殺人不流血；熟練之人手中的言語比武士手中的武器造成的傷害更大。

The Liskov Substitution Principle is a fundamental concept in object-oriented programming, ensuring that derived classes can be used in place of their base classes without altering the correctness of the program.

小說是最能表達人類復(fù)雜性的體裁。

People must feel that the natural world is important and valuable and beautiful and wonderful and an amazement and a pleasure.