Overall, OC use was associated with a slight increase in breast cancer risk (odds ratio, 1.19).For nulliparous women (i.e.是什么意思_Overall, OC use was associated with a slight increase in breast cancer risk (odds ratio, 1.19).For nulliparous women (i.e.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句