求翻译：1. 除小波变换系数残差D1外，其他各阶损伤前后小波变换系数残差在损伤节点752和753及其附近出现明显的极值，即信号发生十分明显的突变，准确地指示了损伤的发生。是什么意思？

1. in addition to D1 Wavelet transform coefficients for residual, all order in Wavelet transform coefficients for residual injury nodes before and after injury and around 752 and 753 appears obvious extremes, mutation of the signal is clear, accurately indicating the injury occurred.

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1. in addition to D1 Wavelet transform coefficients for residual, all order in Wavelet transform coefficients for residual injury nodes before and after injury and around 752 and 753 appears obvious extremes, mutation of the signal is clear, accurately indicating the injury occurred.