平移工具由手形图标表示，允许平移曲线图中的数据，向左或向右移动。
The pan tool is represented by the hand icon and allows you to pan through the data in the graph, moving left or right.
3i就是向x轴方向平移,但是平移3个单位，而不是一个。
3i is just going to go along the x axis but by distance of three instead of one.
在此基础上，将窗中心平移法与时域平移和改变窗长法综合应用，推导出相位差校正的统一公式。
On the basis of this method, and taking advantages of the methods-time-domain translation as well as the window length change, the uniform formula for the phase difference correction is derived.
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