新的标准以母乳喂养的儿童为基础，作为生长和发育的规范。
The new standards are based on the breastfed child as the norm for growth and development.
这是在出生的头两个月以母乳喂养的婴幼儿所占的比例，在近十年间呈现大幅增加。
This is the percentage of infants who were breastfed during the first two months of life, representing a net increase in 10 years.
答：新标准的建立以母乳喂养作为生物学规范，以母乳喂养婴儿为生长和发育的标准。
A: the new standard establishes breastfeeding as the biological norm and the breastfed infant as the standard for growth and development.
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