Since the body of the callback is trivial here, we've defined the entire function inline as an anonymous subroutine.
由于这个回调程序体很小，所以我们将整个函数内嵌为一个匿名子例程来完成。
Global or inline scripts, which are scripts that are not part of an event-handling subroutine or function, are executed immediately.
立即执行全局或内联脚本，这些脚本不是事件处理子例程或函数的一部分。
Global or inline scripts, which are scripts that are not part of an event-handling subroutine or function, are executed immediately.
立即执行全局或内联脚本，这些脚本不是事件处理子例程或函数的一部分。
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