The Centres for Disease Control and Prevention, an American government agency, says that after fortification began, in 1998, the reported prevalence of spina bifida in babies declined by 31%.是什么意思_The Centres for Disease Control and Prevention, an American government agency, says that after fortification began, in 1998, the reported prevalence of spina bifida in babies declined by 31%.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句