We must allow for human error.

我们必须考虑到人为的失误。

Most of the problems were due to human error.

多数问题都是人为错误造成的。

Human error may have been a contributing factor.

人为的失误可能是一个起作用的因素。

The report discloses that human error was to blame for the accident.

报告披露这次事故是人为原因造成的。

The accident was caused by human error.

这一事故是人为错误造成的。