点击下方单词,选择对的这个单词
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形容词
1. 有害的；恶性的If you describe something as pernicious, you mean that it is very harmful.
1. working or spreading in a hidden and usually injurious way
e.g. glaucoma is an insidious diseasea subtle poison
Synonym: insidioussubtle
2. exceedingly harmful
Synonym: banefuldeadlypestilent
多通过句子记忆单词，而不是单独死记硬背。
