偏移

shift excursion的用法和样例：

例句

There is a shift of the midline to the left.正中线向左偏移。
Then, the amount of the range shift between two echoes is searched by using the modified kurtosis as the alignment measure.当两回波和包络的修正峰度达到最大时，以此时的距离偏移量进行补偿，就可将回波对齐。

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