Lines 82 and 83 draw a dotted line at the top and halfway down the Y-axis. This simply makes the graph easier to read.

第82和83行在y轴的顶端和中间各划一条水平虚线，这样做只是为了让查看图时更方便。

youdao

On lines 86 and 87, the Y-axis is labeled at the top, and halfway down.

第86和87行在顶端和中间标记y轴。

youdao

y=1 That's y equals zero to the top, which is at y equals one.

这是y=0，到顶部结束。

youdao

And you can very quickly take this feature to an extreme 10 and start putting X and Y and A and B and 10 and all your variables up top because it would seem to solve all of your problems and stop all of your thinking, but it's generally not a good thing.

你可能迅速地使这个特征成为一个极端,开始把X和Y和A和B和0,和所有的变量都放在最前，因为好像它可以,解决你的所有问题，并中止你的想法，但通常这不是一件好事情。

哈佛公开课 - 计算机科学课程节选

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