After drawing both axes, you draw the gridlines along with their labels by evenly spacing them and then drawing the lines using the same combination of moveTo, lineTo, and stroke.
绘制水平和垂直轴线后，沿着它们的标签绘制网格线，方法是均匀间隔它们，然后使用相同的moveTo、lineTo和stroke组合来绘制这些直线。
Bar codes, familiar to us all as the black and white rectangular mark that enables products in a supermarket to be tracked, represent data using the spacing of parallel lines.
条形码就是我们大家都熟悉的超市中用来跟踪商品的那些黑白色相间的长条标记，它利用这些黑白色平行线的间距来表示数据。
Shall I use single or double spacing (ie single or double spaces between the lines) when I type this letter?
我打这封信是用单行行距还是用双行行距?。
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