area code
柯林斯词典
1. N-COUNT The area code for a particular place is the series of numbers that you have to dial before someone's personal number if you are making a telephone call to that place from a different area. (電話) 區域代碼[美國英語]
The area code for western Pennsylvania is 412. 西賓夕法尼亞的區號是412。
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