In most applications, the graph shows how signals change over time: the vertical (Y) axis represents voltage and the horizontal (x) axis represents time.
在大多数应用中，图形显示信号随时间而变化：垂直(y)轴表示电压和横向(x)轴代表时间。
Y-axis, vertical grinding stroke, straight.
轴，立式磨床行程，直线。
Y-axis, vertical grinding stroke, straight.
轴，立式磨床行程，直线。
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