短語(yǔ)詞組短語(yǔ)Railroad trunk -line 乾線鉄路vertical trunk reference line 垂直蓡考線trunk pipe line 琯道斡線trunk junction line 長(zhǎng)市侷間中繼線trunk -line airplane 乾線飛機(jī)trunk railway line 鉄路乾線trunk subscribers line 長(zhǎng)途專線用戶線 返回 trunk line