区号

dǎ cháng tú diàn huà yào yǒu qū hào cái xíng

打长途电话要有区号才行。

You need an area code to make a long-distance call.

dǎ diàn huà de rén rú guǒ bō cuò qū hào jiù bù néng jiē tōng

打电话的人如果拨错区号，就不能接通。

Callers dialing the wrong area code will not get through.

bīn xī fǎ ní yà xī bù de diàn huà qū hào shì

宾夕法尼亚西部的电话区号是412。

The area code for western Pennsylvania is 412.

qǐng gào sù wǒ qū hào yǐ jí duì fāng de diàn huà hào mǎ

请告诉我区号以及对方的电话号码。

Please tell me the area code and the phone number.