基本解释n.传染性；影响别人同根派生 英汉例句用作名词 (n.)Trichomonad is helminth, have certain infectivity.滴虫是寄生虫，具有一定的传染性。The infectivity and other properties of viruses can be assayed by several methods.病毒的传染性及其它性质可通过几种方法鉴定。