shadow scratch

• 轻微的划痕

shadow scratch的用法和样例：

例句

1. A replica technique is used to record the scratch patterns before and after loading.
   可采用一种复制技术把在加载前后的划痕图案记录下来。
2. They can often be used to remove fine or shallow scratches and swirls, but they will not remove any scratch that is deep enough to place your fingernail into.
   它们通常可去除浅的或螺旋纹，但它们不能去除深度的划痕，即你用手指可感触得到的。