lactosen.乳糖lactose operator locus乳糖操纵点Lactose-free formula无乳糖奶粉lactose tolerance test乳糖耐量试验lactose-litmus broth乳糖石蕊肉汤Lactose controlled diet控制乳糖饮食Lactose restricted diet限制乳糖饮食lactose-litmus gelatin乳糖石蕊明胶lactose-binding lectin乳糖结合性凝集素lactose-hydrolysed milk乳糖废蜜lactose-litmus bouillon[医] 石蕊乳糖肉汤