音标: 英 [sɪˈlektə(r)] 美 [sɪˈlɛktɚ]
1. You dial and a line selector uses the clicks on your rotary phone to figure out which rack to connect your call to.
拨号后 选线器根据 拨盘式电话上的拨动次数判断 哪个齿轮接通电话