rough surface短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 粗糙表面 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。 ecocn