ineffective
US /ˌɪn.ɪˈfek.tɪv/
UK /ˌɪn.ɪˈfek.tɪv/
1.
无效的, 不起作用的
not producing any significant or desired effect
:
•
The new policy proved to be ineffective in reducing crime.
新政策在减少犯罪方面被证明是无效的。
•
His efforts to persuade her were completely ineffective.
他劝说她的努力完全无效。