In many countries ,much attention were paid to Streptococcus suis serotype 2 and many studies were foucus on virulence factors, extracellular protein factor(EPF), muraminidase-released protein(MRP) were two main virulence factors .是什么意思_In many countries ,much attention were paid to Streptococcus suis serotype 2 and many studies were foucus on virulence factors, extracellular protein factor(EPF), muraminidase-released protein(MRP) were two main virulence factors .在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句