Human error may have been a contributing factor.

人为的失误可能是一个起作用的因素。

《牛津词典》

Officials still think mechanical or human error may also have been a factor.

官员还认为机械和人为的因素也是原因之一。

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Officials still think mechanical or human error may also have been a factor.

官员还认为机械和人为的因素也是原因之一。

youdao