常見(jiàn)例句雙語(yǔ)例句It introduces the multi-price and multi-class management theory of air passenger transportation to improve market-directed pricing system of air cargo.引入航空客運(yùn)中的“多等級(jí)多艙位”運(yùn)價(jià)管理思想，健全貨運(yùn)市場(chǎng)化運(yùn)價(jià)體系。 返回 air passenger transportation market