To determine the scope of a declaration , it is sometimes convenient to refer to the potential scope of a declaration 為確定一個(gè)聲明的作用域,通常為方便而提到聲明的潛在作用域。
The scope of a declaration is the same as its potential scope unless the potential scope contains another declaration of the same name 聲明的作用域與其潛在作用域相同,除非潛在作用域包含相同名字的另一個(gè)聲明。