为什么有时触摸点与鼠标箭头有偏差？

Why is there deviation between the touch point and the mouse arrow sometimes?

youdao

比如，当鼠标箭头在其中一个条上悬浮时，实际的数值就会出现(正如工具提示那样)。

For instance, when your mouse pointer hovers over a bar, the exact stat could appear (like a tool tip does).

youdao

屏幕上的鼠标箭头会使用户想到，我怎么才能利用这个箭头来做我想做的事情？

The mouse arrow on the screen the user will think that I can use the arrow how do I want to do?

youdao

Scratch This Boolean expression allows you to say to scratch if you are touching the mouse pointer, the little arrow, do something. How do we do something?

布尔表达式允许你告诉,当你触碰到鼠标指针，也就是小箭头，程序就相应地做一些事情？

哈佛公开课 - 计算机科学课程节选