短語(yǔ)詞組短語(yǔ)trunk line route 干線徑路trunk air route [軍]軍用航空干線trunk mail route 干線郵路secound -class trunk mail route 二級(jí)干線郵路first -class trunk mail route 一級(jí)干線郵路industrial trunk route [工經(jīng)]工業(yè)干線Tianjin trunk route 天津干線trunk route detail 航路干線domestic trunk route network 國(guó)內(nèi)干線網(wǎng)絡(luò) 返回 trunk route