The drugs work well at first but gradually lose their effectiveness.这些药的效果起初非常好,但后来逐渐失效.To assert this is to denigrate the effectiveness of the police.坚持这一点就是贬低警方的办事能力.Bad diction marred the effectiveness of his speech.措...

n.有效，有力，有效性，效益，效用...

Relapses of the malady, ineffectiveness of different drug regimens and even resistance to drugs are emerging.疾病的反复发作, 不同药物治疗方案的无效,甚至耐药性正在出现....

effectiveness的音标：effectiveness的英式发音音标为：[ɪˌfek'tɪvnɪs]effectiveness的美式发音音标为：[ə'fɛktɪvnɪs]...

To evaluate the effectiveness and reliability of hemodialyzer LSHT 160.目的评价LSHT160型血液透析器的有效性及安全性.The good effectiveness of AMPS copolymers had been demonstrated in field application.AMPS聚合物及钻井液体系在现场应用表明:该体系在应用中粘切容易控制,钻井液...

ineffectiveness的音标：ineffectiveness的英式发音音标为：[ˌɪnɪ'fektɪvnəs]ineffectiveness的美式发音音标为：[ˌɪnɪ'fektɪvnəs]...

n.无效果，不起作用，无能力...