The second problem, though, is that laser light can "speckle", which is to say that when it scatters off a rough surface, a random shimmering and sparkling pattern is produced.

第二个问题就是激光光源会产生“光斑”，也就是说激光会在一个不均匀的表面发生散射，产生随机明暗斑点。

youdao

The second problem, though, is that laser light can “speckle”, which is to say that when it scatters off a rough surface, a random shimmering and sparkling pattern is produced.

第二个问题就是激光光源会产生“光斑”，也就是说激光会在一个不均匀的表面发生散射，产生随机明暗斑点。

youdao