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1. Oxford Dictionary

   bell jar

   英式

   • n.
     a bell-shaped glass cover used in a laboratory, typically for enclosing samples.；an environment in which someone is protected or cut off from the outside world

   • noun: bell jar, plural noun: bell jars

2. • 釋義

   n.

   名詞

   • 1. a bell-shaped glass cover used in a laboratory, typically for enclosing samples.
   • ▪ an environment in which someone is protected or cut off from the outside world let him stay in his bell jar of perfectionist concentration