gallons of water are needed to produce one pound of beef.
出自-2013年6月聽(tīng)力原文
While 20 gallons of water are need to produce one pound of wheat
出自-2013年6月聽(tīng)力原文
柯林斯高階英漢雙解學(xué)習(xí)詞典釋義
N-COUNT
加侖（液量單位，1加侖等于8品脫，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8千萬(wàn)加侖水...a gasoline tax of 4.3 cents a gallon.每加侖4.3分的汽油稅