carrier rate短语⁷²²⁹¹ 基本例句 带菌率 Objective To investigate the carrier rate of leptospira of host animals and provide objective bases for control of leptospirosis. 目的了解野鼠、耕牛和猪的钩端螺旋体带菌情况，探讨减少钩端螺旋体病发病影响因素。 chemyq Objective To study the carrier rate of group B streptococcus GBS in pregnant women and its influence on their newborns. 目的了解孕妇的 B族链球菌 GBS带菌情况及对新生儿的影响。 cnki