虚线曲线表示背景水平。

Dashed curves are for background levels.

youdao

图中的虚线表示60%相对湿度的曲线。

In the diagram, the dotted line is the 60% relative humidity curve.

youdao

用于高速公路、市内道路反光标线的直线、虚线、曲线、导向箭头、文字等。

It may be used for highway urban road reflective marking of straight line, dotted line, curve, oriented arrow, letters.

youdao

So, let's, for example, look at nitrogen. So n 2, we can do the chart here in green, so it's the green dotted line, and what we see is that we have now defined this energy as where the 2 nitrogen atoms are separated.

那么，让我们举个例子，看一下氮，那么氮分子，我们可以把它用绿色曲线画在这，这是绿色的虚线，可以看到,我们已经定义为零点能，当两个氮原子分离时。

麻省理工公开课 - 化学原理课程节选