例句
柯林斯高阶英汉双解学习词典释义
英汉词典释义
英英词典释义
  • Noun
    1. an enclosed space;
    "the trapped miners found a pocket of air"
    2. a case or sheath especially a pollen sac or moss capsule
    3. a structure resembling a bag in an animal
行业词典
  • 医学: 囊:袋状器官或结构;