US retail prices for petrol have fallen about half compared with last summer, which traders expect to bolster consumption. Nymex June RBOB unleaded gasoline rose 4.6 cents to $1.8587 a gallon.是什么意思_US retail prices for petrol have fallen about half compared with last summer, which traders expect to bolster consumption. Nymex June RBOB unleaded gasoline rose 4.6 cents to $1.8587 a gallon.在线翻译_英语_读音_用法_例句