每克蛋白质是4卡路里，所以这位54.5千克、每天需要大约54克蛋白质的跑步者每天有200到220千卡的能量来自蛋白质。

One gram of protein equals 4 calories, so our 120-pound runner, who needs approximately 54 grams of protein, should allow 200 to 220 calories for protein each day.

youdao

就营养学而言，食物中的热量通常以千卡计，但简称为卡路里。

In terms of nutrition, values are often given for the number of kilocalories in a food but referred to simply as calories.

youdao

就营养学而言，食物中的热量通常以千卡计，但简称为卡路里。

In terms of nutrition, values are often given for the number of kilocalories in a food but referred to simply as calories.

youdao