exotoxin的音标：exotoxin的英式发音音标为：[ˌeksəʊ'tɒksɪn]exotoxin的美式发音音标为：[ˌeksoʊ'tɒksɪn]...

n.外毒素...

Beta - exotoxin is an inhibitor of RNA polymerase and acts competitively with ATP in various biological processes.外毒素是RNA聚合酶的抑制剂,在各个生化过程中与ATP起竞争作用....