In some places, they form atolls, a circular ring surrounding a lagoon or small inner lake that gaps place in contact with the sea.

在某一处，它们形成一个圆形的环，围绕着一个珊瑚洲或一个内湖，边缘有缺口，可与大海相通。

For instance, a single point of light, when captured by a camera, will appear as a central bright spot, known as a diffraction disk, with weakening circular rings of light spreading out from it.

例如，当相机捕捉到单个光点时，它会显示为一个中心亮点，称为衍射盘，光环会从它散开。