Porcince Parvovirus(PPV),a major pathogen of swine,causes reproductive failure of sow characterized by embryonic and fetal infection and death.是什么意思_Porcince Parvovirus(PPV),a major pathogen of swine,causes reproductive failure of sow characterized by embryonic and fetal infection and death.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句