Definition

Examples

• 墙上出现了一个孔洞。
  Qiáng shàng chūxiàn le yí gè kǒng dòng.
  A hole appeared in the wall.
• 这块岩石上有很多孔洞。
  Zhè kuài yánshí shàng yǒu hěn duō kǒng dòng.
  This rock has many cavities.
• 工程师用特殊材料填补了那个孔洞。
  Gōngchéngshī yòng tèshū cáiliào tiánbǔ le nà ge kǒng dòng.
  The engineer filled that hole with special material.