在大括号内，可以包含任何公式。

Within the braces, you can include any formula.

为什么在receive 后面的代码被包含在大括号｛｝中而不是小括号（）呢？

Why is the code after receive enclosed in curly braces ({…}) and not parentheses ((…))?

请注意，文件路径中展开的大括号（不是完整的远程路径表达式）已用双引号括上。

Note that the brace expansion of the file path, not the full remote path expression, has been enclosed in double quotes.

要捕获一系列命令的输出，最简单的方法是使用大括号 ({ })将命令括起来。

The easiest way to capture the output of a series of commands is to combine them within braces ({ }).