®=解释
#=例句
词组
lead to sth ...导致...
#For some people, exercise can in fact lead to a migraine.
irritability 易怒
merge =Join together 合并
Social media 社交媒体
portmanteau words 合成词，合并词
smarty pants.
®a person who talks and behaves like someone who knows everything
#Go ahead, smarty-pants, tell us about your grade point average.
#Don't be such a smarty-pants. [=know-it-all
实用句子
You know what i'm talking about?
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