Local variables are faster to access than out-of-scope variables because they exist in the first variable object of the scope chain.

局部变量比域外变量快，因为它位于作用域链的第一个对象中。

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Every object and variable you set is also one you need to remove after the fact.

您创建的每一个对象和变量都需要在测试之后删除。

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Therefore, you must first assign a new business object instance to a business object variable before using it.

因此，在使用业务对象变量前，必须首先将新的业务对象实例赋值给它。

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"This object was changing its brightness by a factor of three or four -- it was just enormously variable, " Tholen said.

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