A rainbow looks like a half circle.
彩虹看着呀，像半个大圆圈。
But the whole rainbow is a full circle.
其实彩虹，是一整个完整的圆。
The ground blocks the lower half.
地面挡住了下面那一半。
From a plane, you can see the whole ring.
从飞机上往下看，能看到整圈。
Rain drops split sunlight into colors.
小雨滴把阳光，拆成了好几种颜色。
Red stays outside, and purple stays inside.
红的在最外面，紫的挨着里面。
A rainbow is always an arc around you.
彩虹呀，永远绕着你画弧。
