All too often when the curvefitting results are confusing or appear distorted, the effects will be blamed on noise or nonlinearities.

当曲线拟合结果令人迷惑或者看上去不正常的时候，太多的时候是把这些效果归咎于噪声或非线性。

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Modal parameter estimation (commonly referred to as curvefitting) is probably, by far, the hardest part of experimental modal analysis for most people to understand.

到目前为止，对大多数人来讲，模态参数估计（通常称为曲线拟合）可能是试验模态分析中最难以理解的部分。

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