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The secondary rules are those that provide for the creation, alteration, and extinction of primary rules.
The energy transition is not just about switching from fossil fuels to renewables; it's about making the entire energy system more sustainable.
爱情中的欢乐和痛苦是交替出现的。
艺术是思考世界的一种方式。
学习计算机体系结构的最好方法就是构建一个。