Functions that have a variable argument list (...).
具有可变参数列表的函数(…)。
Note here that the argc variable (argument count) is implicit, because the length of the argv list is known.
请注意这里的argc变量(参数数量)是隐式的，因为argv列表的长度已经知道。
The second call to f will have the variable list containing only 8.333, while a becomes the first argument.
对f的第二次调用的可变列表只包含 8.333，而a变成第一个参数。
Line 4 sets the variable was to the value of the next item in the argument list.
第4行将变量was设置为参数表中下一项的值。
To set the default property value, use the variable name, with an argument list, on the left side of an assignment statement.
若要设置默认属性值，请在赋值语句左侧使用带有参数列表的变量名。
The underscore variable is set at shell startup and contains the absolute file name of the shell or script being executed as passed in the argument list.
$_下划线变量在shell启动时设置，包含shell的绝对文件名或者作为参数列表被执行的脚本。
The underscore variable is set at shell startup and contains the absolute file name of the shell or script being executed as passed in the argument list.
$_下划线变量在shell启动时设置，包含shell的绝对文件名或者作为参数列表被执行的脚本。
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