金刚石 (jīn gāng shí) — diamond (mineral, gemstone)

定義

例文

• 金刚石是自然界中最硬的物质。
  jīn gāng shí Shì zì rán jiè zhōng zuì yìng de wù zhì.
  Diamond is the hardest substance in nature.
• 这颗金刚石重达十克拉。
  Zhè kē jīn gāng shí zhòng dá shí kè lā.
  This diamond weighs ten carats.
• 工业上常用金刚石来切割玻璃。
  Gōng yè shàng cháng yòng jīn gāng shí lái qiē gē bō li.
  In industry, diamonds are often used to cut glass.