negative material的用法和樣例：
例句
- When a rotor is cleaned, it will need to be re-burnished again to re-deposit the friction material onto the surface.
當碟盤(pán)被清洗后，它將需要重新磨合以使摩擦性材料重新沉積到碟盤(pán)表面。 - The textbook contains more explanatory material than models and is therefore hard to plough through.
這本教科書(shū)中，說(shuō)明性材料多于范文，所以難以閱讀。
