A young maternal age at first birth, especially when younger than 20 years, was associated with chronic LBP and combined chronic LBP/UEP.是什么意思_A young maternal age at first birth, especially when younger than 20 years, was associated with chronic LBP and combined chronic LBP/UEP.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句