It now advises 400 international units daily of vitamin d, which kids can get by drinking four cups a day of fortified milk.
目前建议每日摄取400个国际单位的维生素d，而每天喝四杯纯牛奶即可达到该量。
It now advises 400 international units daily of vitamin d, which kids can get by drinking four cups a day of fortified milk.
目前建议每日摄取400个国际单位的维生素d，而每天喝四杯纯牛奶即可达到该量。
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