Creates the common reason which the young child is poisoned is mainly because naive, lacks the experience, cannot distinguish virulent or non-toxic.

造成小儿中毒的常见原因主要是由于年幼无知，缺乏经验，不能辨别有毒或无毒。

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The positiveness of the contact hemolysis was correlated with the virulence of bacteria when virulent or non-virulent strains of enterobacteria were compared.

比较强毒肠道菌及其无毒突变株的溶血能力与毒力相符；

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In the Sabin vaccine, or the oral polio vaccine, now you have a non-virulent virus.

在沙宾疫苗,即口服小儿麻痹症疫苗中,存在非致病性病毒

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