【阶梯文本】
mistake
错误
discover your mistakes
发现你的错误
the first to discover your mistakes
第一个发现你的错误
they are the first to discover your mistakes.
他们是第一个发现你的错误的人。
Pay attention to your enemies for they are the first to discover your mistakes.
注意你的敌人，因为他们总是第一个发现你的错误。

【单词解析】
mistake:错误、过失；实用短语：make a mistake 犯错误；实用例句：I took his umbrella by mistake.我错拿了他的伞。