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
and good-bye.
再见。
A word spoken is an arrow let fly.
一言既出,驷马难追。
Here it is, Mom! That's one thing I haven't forgotten today!