对于参数模型软体错误强度，本文首次建议加权最小平方(WLS)估计。

For estimating the software error intensity of parametric models, weighted least-square (WLS) estimate is suggested for the first time.

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到 25 的严重性层级表示软体或硬体错误。

Severity levels from 17 through 25 indicate software or hardware errors.

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为了用户和作者的利益，gnu通用公共授权要求软体被修改过的版本必须明确标示，从而避免它们的问题被错误地归咎于先前的版本。

For both users' and authors' sake, the GPL requires that modified versions be marked as changed, so that their problems will not be attributed erroneously to authors of previous versions.

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