The only way to pass scope keys across multiple components is through method calls.
跨多个组件传递范围键的惟一方法是通过方法调用。
In this scenario, multiple programs pass different channels to the same program.
在这个场景中,多个程序将不同的管道传递到相同的程序。
But sometimes you can pass multiple things inside those parentheses, and so you separate them by commas.
有时候我们可以往圆括号里填入多个参数,参数与参数之间用逗号分开。
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