The principal square root function is defined using the nonpositive real axis as a branch cut.

主平方根函数是使用非正实轴作为分支切割定义的。

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An absolute pathname begins with the root directory and follows the tree branch by branch until the path to the desired directory or file is completed.

绝对路径名从根目录开始，通过一个又一个的分支，一直到你要去的目录或者文件为止。

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The root directory, denoted by a forward slash (/), is at the base of this tree, and each subdirectory off of the root is a branch of the tree.

根目录是这个树的根，由前向斜杠 (/) 表示。 每个子目录都是树的分支。

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He came to Wembley armed with advisers and a PowerPoint presentation, proposing root and branch change in English national football.

BBC: Radio 4 Profile: England manager Fabio Capello

However, Sinn Fein has said it will tell MPs that there must be root and branch reform of the force.

BBC: 'No NI progress for years'

There needs to be root and branch change at this entire organisation.

BBC: News Corp withdraws bid for BSkyB