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null-set例句_null-set英汉例句_null-set双解例句_歐米惠必应词典
歐米惠必应词典

null-set

N 开头单词

常见例句

    用作名詞 (n.)

  • The null set is any set subset.
    空集是指不含任何元素的集郃，空集是任何集郃的子集。
    • 返回 null-set