norvegicus caught in nine districts in Changchun were tested. The resistance rate was 3.45%. The average dosage taken were 19.86 mg/kg.是什么意思_norvegicus caught in nine districts in Changchun were tested. The resistance rate was 3.45%. The average dosage taken were 19.86 mg/kg.在线翻译_英语_读音_用法_例句