The due date is estimated as 280 days from the time of last menstruation; 90% of babies are born within two weeks of the estimated date.是什么意思_The due date is estimated as 280 days from the time of last menstruation; 90% of babies are born within two weeks of the estimated date.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句