短語詞組短語extension n telephone set 電話分機(jī)extension telephone set 電話分機(jī)Extension of international telephone services 國際電話業(yè)務(wù)的擴(kuò)展extension telephone set telephone extension 電話分機(jī)telephone extension 電話分機(jī)extension of base field telephone 竝接電話extension number of a telephone 電話分機(jī)號碼fire telephone extension 消防電話分機(jī) 返回 extension telephone