【command_substitution】什么意思_英语command_substitution的翻译_音标_读音_用法_例句_在线翻译

command substitution

命令替换

命令替换（command substitution）：命令替换允许在一条命令中嵌入另一条命令。shell首先执行嵌入的命令，并且用输出替换该命令。

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命令置换

放到这里，就是Weak Quotes(双引号)和command substitution(命令置换)的作用：未加双引号：

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使得可以捕获一个命令的输出而在另一个命令中替换它

... command line 命令行 command substitution 命令替换，使得可以捕获一个命令的输出而在另一个命令中替换它。 composite widget 复合构件 ...

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命令替代

命令替代(command substitution)之前就是说${}时``还没有替代

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短语

abstract: In computing, command substitution is a facility originally introduced in the Unix shells that allows a command to be run and its output to be pasted back on the command line as arguments to another command. Shells typically do this by creating a child process to run the first command with its standard output piped back to the shell, which reads that output, parsing it into words separated by whitespace.

以上来源于: WordNet

The first backquote not preceded by a backslash terminates the command substitution.

不带反斜杠的第一个后引号终止命令替换。

youdao
What we did above is called "command substitution".

上面所做的称为“命令替换”。

youdao
You saw an example of command substitution in Listing 9 when we created a captive TAB character.

我们曾经在清单9中创建了一个强制制表符，您可以从中看到命令替换的例子。

youdao

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