1. 乳糖：microprint 缩影相片 | milk sugar 乳糖 | stripped atom 裸原子, 剥脱原子(失去外层电子的原子)

2. 奶糖：dumpling 汤圆 | milk sugar 奶糖 | soy milk power 豆奶粉

3. 乳糖,乳糖酶：milk strainer == 牛奶过滤器,奶过滤器 | milk sugar == 乳糖,乳糖酶 | milk survillance network == 牛乳监视网

noun

1. a sugar comprising one glucose molecule linked to a galactose molecule
occurs only in milk

e.g. cow's milk contains about
4. 7% lactose

Synonym: lactose