Lebesgue measurable set and the complete and nowhere dense set are two kinds of important set and are the important content in the real variable function.
勒贝格可测集和疏朗完备集是两类重要集合，是实变函数中的重要内容。
Lebesgue measurable set and the complete and nowhere dense set are two kinds of important set and are the important content in the real variable function.
勒贝格可测集和疏朗完备集是两类重要集合，是实变函数中的重要内容。
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