abrasion

相關對話：

1. A hole or worn spot made by abrasion or erosion.
   侵蝕處由於侵蝕或磨擦形成的洞或破處
2. Poorly crystallized diamonds used for industrial cutting and abrasion.
   結晶差的金剛石用作工業切割和研磨。
3. A minor scratch or abrasion.
   擦傷一個輕微的擦傷或磨損
4. An implement with cutting edges or a pointed end for boring holes in hard materials, usually by a rotating abrasion or repeated blows; a bit.
   鑽帶切割刃或尖端的工具，用於在堅硬材料上鑽孔，一般靠旋轉磨損或反覆擊打實現鑽孔

英文解釋：

名詞 abrasion:

1. an abraded area where the skin is torn or worn off
   同義詞：scratch, scrape, excoriation
2. erosion by friction
   同義詞：attrition, corrasion, detrition
3. the wearing down of rock particles by friction due to water or wind or ice
   同義詞：grinding, attrition, detrition