However you can put them to some more constructive uses also, like create a spectroscope or a shuriken throwing star or a mobile phone holder.

• 首先我们来剖析一下刮痕对光盘的损害程度，一般来说垂直的刮痕（从中心向外映射）比螺旋型的刮痕伤害要低得多。