ineffective
adj
not producing the required effect(s) 不起作用的; 无效果的; 效果不佳的
use ineffective methods 使用无效的方法
She is totally ineffective as a teacher, ie She cannot teach satisfactorily. 她当老师全然不称职.
🗣️ 情景例句
Hello.
你好。
Is that ok?
这样行吗?
Yes, it is.It's very urgent.I feel awful. I have a terrible toothache.