一卡路里是将一克水的温度升高一摄氏度所需的能量。
A ___calorie is the energy required to raise the temperature of 1 gram of water by 1°C.
一个苹果大约含有90卡路里。
An apple contains about 90 ___calories.
披萨虽然美味,但含有大量卡路里。
Pizza is delicious but packed with ___calories.