点击下方单词,选择对的这个单词
1. 未经证实的;无根据的;不确凿的A claim, accusation, or story that is unsubstantiated has not been proved to be valid or true.
1. unsupported by other evidence
Synonym: uncorroborated
多通过句子记忆单词,而不是单独死记硬背。