Relationship between changes of blood flow velocity of superior mesenteric artery before and after the feeding with color Doppler ultrasonography and tolerance to enteral feeding in premature neonates是什么意思_Relationship between changes of blood flow velocity of superior mesenteric artery before and after the feeding with color Doppler ultrasonography and tolerance to enteral feeding in premature neonates在线翻译_英语_读音_用法_例句