点击下方单词,选择对的这个单词
1. 尖刻的;刻薄的;尖锐讥讽的Mordant humour is very critical and often mocks someone or something.
1. a substance used to treat leather or other materials before dyeingaids in dyeing process
多通过句子记忆单词，而不是单独死记硬背。
