婴儿和哺乳动物的幼崽几乎都是从奶中获取成长所需的全部营养而逐渐长大的。牛奶有一股淡淡的甜味,这是由于它含有4.8%左右的乳糖。牛奶含有多种人体所必需的氨基酸,还有丰富的维生素A、B、C、D、E和钙、铁、磷等多种矿物质。钙质对婴儿生长有特别的帮助,因为它是建造骨骼的“砖头”。对婴儿来说,身体发育所需要的各种营养素,牛奶中几乎无所不包,而且牛奶很好消化。 Almost all baby and mammal pups grow from milk to get the full nutrition they need to grow. Milk has a hint of sweetness because it contains about 4.8% lactose. Milk contains many essential amino acids, but also rich in vitamins A, B, C, D, E and calcium, iron, phosphorus and other minerals. Calcium is particularly helpful for infants as it is the “brick” that builds the skeleton. For infants, the nutrients that are needed for body development are almost completely contained in the milk, and the milk is well digested.