The ultrasonography of placental grading, biparietal diameter (BPD) and amniotic fluid in 377 cases at late period of pregnancy are studied and evaluated.是什么意思_The ultrasonography of placental grading, biparietal diameter (BPD) and amniotic fluid in 377 cases at late period of pregnancy are studied and evaluated.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句