shadow scratch的用法和樣例：
例句
- A replica technique is used to record the scratch patterns before and after loading.
可采用一種復制技術(shù)把在加載前后的劃痕圖案記錄下來(lái)。 - 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.
它們通?？扇コ郎\的或螺旋紋，但它們不能去除深度的劃痕，即你用手指可感觸得到的。
