非受迫性失误的英文：
Unforced error
a. 非被强迫的,自然的,不勉强的
error是什么意思：
n. 错误；出错；谬见；过失；误差
IMAP Error The message could not be saved due to an error.
IMAP错误由于发生了一个错误，无法保存此消息。
An error by a hairbreadth may eventually result in an error of a thous
毫厘千里
He was convicted of his errors.
他认识到自己所犯的过失。
The accident was caused by human error.
这一事故是人为错误造成的。
Every man is liable to error.
人人都可能犯错误。