aerocyst（气囊）是什么意思？音标发音+图解场景

气囊 /ɐdmˈɪnɪstɹətˌɪv ˈɒfɪsɪz/ n

English: aerocyst · 气囊

释义：Small gas-filled bladder containing nitrogen and oxygen; it is located in the thallus of some algae and provides buoyancy.

这个词出现在以下图解场景（1）