Warning: file_put_contents(/www/wwwroot/ppbbu/62383.com/cache/907380cda8ff8ee238e5c505eb96b8d5.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/62383.com/index.php on line 55
null-set例句_null-set英汉例句_null-set双解例句_流逝汉英词典
流逝汉英词典

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