Objective: To evaluate the functions of placenta by detecting umbilical artery flow velocity S/D value on 186 women of late pregnancy.是什么意思_Objective: To evaluate the functions of placenta by detecting umbilical artery flow velocity S/D value on 186 women of late pregnancy.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句