前缀、后缀
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	Prefix: 前缀 
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	Suffix: 后缀 
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	A pair of useful prefixes: 一对超好用的前缀 
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	Over: 超过 
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	Under: 不足 
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	We've prepared a group of verbs and adjectives with over and under prefixes: 我们为大家准备了一系列含有over和under的动词和形容词 
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	Generally speaking, "over" means too much, and "under" means not enough: 基本上,"over"的意思是过头、"under"则是不够、不足 
 现在,我们就来看看日常生活中最常用的带有over、under前缀的单词:
动词:
 
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	Overdo: 一件事做得过头,比如: I overdid the exercises and injured myself. 我健身过度、结果伤到自己了。 
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	Underdo: 反义,但口语里很少这么说 
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	Overcook: 烧得过头、烧老了。比如:The steak was overcooked. 牛排煎老了。 
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	Undercook: 反义。比如: Don't ever unercook pork and chicken. 猪肉、鸡肉千万不能夹生。 
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	Overprepare: 过度准备,不过这是over前缀单词中少有的积极行为。比如I'd rather overprepare than underprepare. 我情愿多准备,也不愿准备不足。 
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	Underprepare: 反义。 
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	Overthink: 思考过度、想太多。比如Just follow your instincts. Don't overthink it. 相信直觉,别想太多。(注意,口语里不太用underthink) 
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	Overanalyze: 分析过度。比如I tend to overanalyze things. 我常常分析过度。 
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	Overreact: 反应过度。比如It was nothing. Stop overreacting. 根本没什么,不要反应那么激烈。 
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	Overestimate: 高估 
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	Underestimate: 低估。比如They lost the game because they underestimated their opponent. 他们低估对手,因此输掉了比赛。 
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	Overvalue: 估值太高。比如Tesla stock is overvalued. Tesla股价过高。 
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	Undervalue: 反义。比如My contribution was seriously undervalued by my boss. 我老板严重低估了我的贡献。 
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	Overwhelm: 压倒、占据。比如I am overwhelmed by work. 工作实在太多,把我压的喘不过气来。 
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	Underwhelm: 反义,也有令人失望的意思。比如Despite its positive reveiws, the movie underwhelmed me. 虽然有很好的口碑,但是这部电影让我很失望。 
形容词:
 
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	Overconfident: 过度自信。比如Always be aware if you're overconfident. 要有意识,以免自己自信过头。 
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	Overqualified: 资历过高。比如They are just hiring someone junior. I'm overqualified for the role. 他们只想招一位资历浅的员工,我的资历太高了。 
上述看到的over前缀单词,其实都可以加under. 但是以下这些口语里不常用:
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	Underdo 
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	underthink 
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	Underanalyze 
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	Undereact 
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	Underconfident 
最后,送大家一句实用的座右铭:
Under promise, over deliver.

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