effectivenessKK [ɪˋfɛktɪvnəs] /ɪˈfɛktɪvnəs/發音名詞1效果、成效、效力Researchers are still testing the effectiveness of the new vaccine.研究人員仍在測試這款新疫苗的效果。2有效性、效能較正式The report questioned the effectiveness of current safety regulations.該報告質疑現行安全法規的有效性。