直通換料once: adv. 1.一次,一趟,一回,一遍;一倍。 I sho ...through: The river flows throug ...refuel: (給…)加油[燃料]。 refuel station ...once through: 直流式once through boiler: 單程流通式鍋爐, 貫通鍋爐; 直流鍋爐; 直柳爐下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯