第三個用途其實就係 同我哋身體嘅基礎代謝率有關 當你唔吃飯唔郁嘅時候都好 你都需要一啲卡路里去維持生命
The third use is actually related to our body's basal metabolic rate, when you don't eat or move, it's fine, and you also need a little calorie to stay alive