Methods Guinea pig aged 4 weeks were divided into 3 groups:blank control (control) group (n=9),per os (PO) group (n=18),and intramuscular (IM) group (n=18).是什么意思_Methods Guinea pig aged 4 weeks were divided into 3 groups:blank control (control) group (n=9),per os (PO) group (n=18),and intramuscular (IM) group (n=18).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句