Human error may have been a contributing factor.
人为的失误可能是一个起作用的因素。
While some say it was due to human error, others say the unusual appearance of a large iceberg in a region of the Atlantic Ocean was the main factor.
有些人认为是人为原因所致,而有些人则认为是大西洋海域出现的冰山异常所致。
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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