If we think of local variables as properties of some kind of implementation-defined object, then there is another way to think about variable scope. If we think of local variables as properties o
阅读背景：
在看JavaScript：权威指南（The.Definitive.Guide ），implementation-defined是什么 意思？谢谢
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If we think of local variables as properties of some kind of implementation-defined object, then there is another way to think about variable scope. If we think of local variables as properties o
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