it just works. no special machinery needed. the boolean operators distribute over derivatives the same way union does. derivatives are such a powerful and interesting tool that i will dedicate a separate post to them, but the main point is that they give us a simple and uniform way to handle all regular language features, including intersection and complement.
30 years of Pokémon: The memes that made it immortal
。关于这个话题，体育直播提供了深入分析
learned how to address it,
这个结论足够可悲，但也无人可以阻止它的到来。
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