[] a series of wires carried on poles or under the ground that joins a home, an office, etc. to a telephone network固定线路◆Many of their customers have switched from fixed lines to mobile phones.他们的许多顾客已从固定电话线路转用移动电话。◆Calls to fixed-line phones are charged at 12¢ a minute.打给固定电话的收费为每分钟 12 分。