The HAV infection was dominated in low age groups.With the ageing of patients,the propotion of HBV increased.For the patients aged over 40 HEV increased.是什么意思_The HAV infection was dominated in low age groups.With the ageing of patients,the propotion of HBV increased.For the patients aged over 40 HEV increased.在线翻译_英语_读音_用法_例句