日期：
来源：雅诚德英语网
The H5N1 avian flu virus is sweeping through flocks of poultry in Asia and sometimes Africa and Europe.
H5N1型禽流感病毒席卷了亚洲，非洲和欧洲成群的家禽。
The H5N1 avian flu virus is sweeping through flocks of poultry in Asia and sometimes Africa and Europe.
H5N1型禽流感病毒席卷了亚洲，非洲和欧洲成群的家禽。