Let's say that you heat up a cloud of hydrogen until it emits light, and then you point your spectrometer at the cloud.

假设你加热一团氢气直到它发光，然后你将光谱仪对准云。

When we see it edge-on the thick dust in the disk blocks the intense highest-energy light, but we do see lots of infrared as the radiation from the disk heats up clouds of dust around it.

当我们看向它的边缘时，在圆盘上的厚尘埃阻挡了强烈的最高能量的光，但我们确实看到了大量的红外线，因为来自圆盘的辐射加热了它周围的尘埃云。