inefficacious
01
无效的, 效果不佳的
not effective in achieving the intended purpose
Disapproving
Formal
例子
The cleaning product, marketed as a stain remover, was inefficacious in removing stubborn stains from various surfaces.
这款清洁产品作为去污剂销售，但在去除各种表面的顽固污渍方面无效。
词汇树
inefficacious
efficacious
efficacy
