The polymerase chain reaction(PCR) technique was used to determine virulent duck plague virus(DRV) in 100-dayold ducks infected artificially with DPV and infected naturally with DPV,and observe the histopathology changes of tissues and organs.是什么意思_The polymerase chain reaction(PCR) technique was used to determine virulent duck plague virus(DRV) in 100-dayold ducks infected artificially with DPV and infected naturally with DPV,and observe the histopathology changes of tissues and organs.在线翻译_英语_读音_用法_例句