关键词：婴儿食品；奶粉；牛奶；配方奶；市场趋势
摘 要：Milk formulas are a substitute to human milk and are used as a complete or partial food for infants(kids not more than 12 months of age). There are three forms of formula milk that are marketed in the US: powdered, liquid concentrate and ready to feed. The powdered form of formula milk is the oldest available substitute since late 1800.
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