它的发病与黄疸型肝炎的前驱期相似.The onset of this disease may resemble the prodromal period of icteric hepatitis.采用硝酸铁、硝酸锌、柠檬酸制备前驱体,在不同加热温度与速率下制备锌铁氧体.The citrate sol - gel synthesis method has been used to prepare zinc ferrite.以硫酸钛作为前驱...
I still suffer from catarrh and sinus problems.我仍然患有黏膜炎和鼻窦炎。This normal variation in rhythm is known as sinus arrhythmia.节律的这种正常变化称为窦性心律失常.Sinus bradycardia occurs when the heart rate falls below 60.窦性心动过缓是心率低于60次....