Surface quantity的用法和樣例：
例句
- The inner surface is to be metalized as a reflector so the finish is of more importance than the composition.
內表面要像反光鏡一樣的具有金屬光澤，所以表面質(zhì)量要比材質(zhì)的成分更重要。 - But the well surface of these materials grou nd was achieved difficultly with common grinding.
但采用傳統磨削工藝加工這些材料很難得到良好的表面質(zhì)量。
