今日词汇：undermine
Jun 16, 2020•2 min
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Episode description
获取节目完整音频和笔记，请关注威信公众号「单词躲不掉」，回复「笔记」即可。全网第一个由北美外教主讲的单词号，每天教你一个单词，轻松提高词汇量！
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