Objective To study the thiamin and riboflavin status in pregnant women from urban (n=35) and rural (n=31) areas in Beijing.是什么意思_Objective To study the thiamin and riboflavin status in pregnant women from urban (n=35) and rural (n=31) areas in Beijing.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句