点击下方单词,选择对的这个单词
1. 指责,非难,质疑(他人的动机、诚信等)If you impugn something such as someone's motives or integrity, you imply that they are not entirely honest or honourable.
1. attack as false or wrong
多通过句子记忆单词，而不是单独死记硬背。
