蓝宝石 zhēnkōng

  1. zhēnkōng noun a vacuum
    Domain: Modern Chinese 现代汉语 , Subdomain: Physics
    Notes:
  2. lánbǎoshí noun a sapphire
    Domain: Modern Chinese 现代汉语 , Subdomain: Geology , Concept: Gemstone 宝石
    Notes: (CC-CEDICT '藍寶石'; Guoyu '藍寶石')