例句
This tiny fan is ineffective in such a large room.
这个小风扇在这么大的房间里起不了作用。
Awareness campaigns may be ineffective unless governments also provide affordable alternatives to environmentally harmful products.
如果政府不同时提供价格可负担的环保替代品，宣传活动可能难以奏效。
常用搭配
- ineffective treatment｜无效的治疗
- ineffective policy｜无效的政策
- prove ineffective｜结果证明无效
词形与相关词
effective (adj.) · ineffectively (adv.) · ineffectiveness (n.)
用法提示
ineffective指无效果；inefficient指效率低。