When the function exits, the call object is removed from the scope chain.

在函数退出时，调用对象就会从作用域链中去掉。

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When no nested functions are involved, the scope chain is the only reference to the call object.

如果不涉及到内嵌函数，这个作用域链是唯一引用到调用对象的。

youdao

Global variables are always the slowest to access because they are always last in the scope chain.

全局变量总是最慢的，因为它们总是位于作用域链的最后一环。

youdao

Going forward, we expect it to increase gradually to around 22%, as the company believes that there is further scope for optimizing its supply chain and improving operational efficiency.

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