The Liskov Substitution Principle is a fundamental concept in object-oriented programming, stating that objects of a superclass should be replaceable with objects of a subclass without affecting the correctness of the program.
里氏替換原則是面向?qū)ο缶幊讨械囊粋€基本概念，它指出子類的對象應該能夠替換超類的對象而不影響程序的正確性。
A thermonuclear war cannot be considered a continuation of politics by other means (according to the formula of Clausewitz). It would be a means of universal suicide.
可持續(xù)性不再是可選項；它是農(nóng)業(yè)未來的必需品。