adj.（细菌等）无毒力的，无致病力的，无毒性的...

avirulent的音标：avirulent的英式发音音标为：[əvɪəru:'lənt]avirulent的美式发音音标为：[əvɪəru'lənt]...

Because variety of reasons are popularized hard , replace the new - style and avirulent product of benzene preparation.替代苯制剂的新型无毒产品由于种种原因难以推广....