...For function code: for each formal parameter, as defined in the FormalParameterList, create a property of the variable object whose name is the Identifier and whose attributes are determined by the type of code. 对函数代码：对于每个形参，按照它们在形参列表里的定义，都建立一个对象的属性，该属性的名字是形参的标识符，其特征由代码的类型决定。
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