Warning: file_put_contents(/www/wwwroot/zidian/diubi.cn/cache/2e40ca97317e3d343293e883b4ac57f3.txt): failed to open stream: No space left on device in /www/wwwroot/zidian/diubi.cn/index.php on line 59 vinculum英英字典_vinculum剑桥英语解释_vinculum柯林斯英文解释_果味酸柯林斯词典
1. N a horizontal line drawn above a group of mathematical terms, used as an alternative to parentheses in mathematical expressions, as in x + y – z which is equivalent to x + (y – z) 括線