基本解釋[數(shù)學]類的零集英漢例句雙語例句Also, many times member variables of a class that point to other classes simply need to be set to null at the appropriate time.此外，您常常需要在適儅的時候?qū)⒅笗谄渌惖念惓蓡T變量設置爲 null。null set of class更多例句詞組短語短語null set of class nf NF 類零集null set of class更多詞組專業(yè)釋義數(shù)學類的零集