Area code
01
区号, 区域代码
a series of numbers at the beginning of a phone number that specifies a region, town, etc.
例子
I accidentally dialed the wrong area code when trying to reach my friend in another city.
我试图联系另一个城市的朋友时，不小心拨错了区号。
Before calling a different region, make sure you include the correct area code.
在拨打不同地区之前，请确保包含正确的区号。
