它本质上和激光束是一样的。激光是我们更熟悉的光束，经常是红色或绿色的，用于外科手术或者作为PowerPoint幻灯片演示用的激光笔。

It's basically the same thing as a laser beam, the more familiar light beams, often red or green, used for surgery or to point at a PowerPoint presentation.

youdao

它本质上和激光束是一样的。激光是我们更熟悉的光束，经常是红色或绿色的，用于外科手术或者作为PowerPoint幻灯片演示用的激光笔。

It's basically the same thing as a laser beam, the more familiar light beams, often red or green, used for surgery or to point at a PowerPoint presentation.

youdao