n.卡（热量单位）；卡路里
=calorie.
How many calories can an ounce of sugar supply? 一盎司糖可以供给多少卡热量？
Her diet restricts her to 1500 calories a day. 她的规定饮食限制她每天摄入1500卡的热量。
An ounce of sugar has about 100 calories. 一盎司的糖含约100大卡的热量。
