he often makes mistakes
他经常犯错误
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Being careless, he often makes mistakes.
由于马大哈，他经常出错。
youdao
He often makes mistakes when speaking English.
他说英语时常常犯错误。
He's quite clever; nevertheless, he often makes mistakes.
他相当聪明，然而他常常出错。
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