Gets or sets the length of tick marks.
获取或设置刻度线的长度。
The tick marks are visual indicators that are spaced at regular intervals.
刻度线是按规则间隔分隔的可视化指示符。
For example, axes, tick marks, and gridlines have been subdued to allow the data in the plot area to stand out more.
例如,轴,标识和网格线都被柔和了,以使绘图区的数据更加突出。
but you can sort of tell that the particle is moving slowly or rapidly by looking at the space in between these tick marks.
但你可以通过观察计时点之间的距离,来判断该物体运动的快慢
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