基本解釋[數(shù)] 可列可加性詞組短語(yǔ)短語(yǔ)countable additivity set function 可列可加集函數(shù)countable additivity更多詞組專業(yè)釋義數(shù)學(xué)可數(shù)可加性可列可加性可列加性