emery rock

常见例句

• The emery is a hard metallic substance.
  金刚砂是非常坚硬的金属物质。
• She rubbed the glass with emery paper.
  她用砂纸磨玻璃。
• The rock was honeycombed with passages.
  岩石上有许多蜂窝状的小孔。
• Many young rock hounds grow up to be geologists.
  许许多多爱好收集岩石的少年，长大后成了地质学家。
• The climber had to negotiate a steep rock face.
  那攀登者得攀越一陡峭岩石。
• This layer of rock contains a lot of flint.
  这一岩层中有大量燧石。
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