N-COUNT
加仑（液量单位，1加仑等于8品脱，英制等于4.564升，美制等于3.785升）
A gallon is a unit of measurement for liquids that is equal to eight pints. In Britain, it is equal to 4.564 litres. In America, it is equal to 3.785 litres.
例句
...80 million gallons of water a day.
每天8千万加仑水
...a gasoline tax of 4.3 cents a gallon.
每加仑4.3分的汽油税