What makes milk so powerful? Let’s see what’s in 100 grams(克)of milk fresh from a 【1】!

Water makes up the 【2】part, with around 【3】 grams. The second largest part is lactose(乳糖)， or the sugar in milk. There is also a lot of rich protein in milk, about 3 grams. The human body can take this 【4】easily. Calcium and vitamins make up less than one oer cent of milk. Too little, right? But these small parts do a big job. Calcium and vitamin D help build stronger bones(骨骼)and teeth. Vitamin A is good 【5】 our eyesight and B helps your body make more energy.