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（学业或事业上）达到（特定程度）成就（或成绩）的人
A high achiever is someone who is successful in their studies or their work, usually as a result of their efforts. A low achiever is someone who achieves less than those around them.
例句
High achievers will receive cash bonuses...
业绩出众的人会获得现金奖励。
In school, he was not one of the achievers.
上学时他不属于拔尖的那类。