vinculum
柯林斯詞典
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(xiàn)
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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(xiàn)