| 单词 | air bladder |
| 释义 | Word Frequency air bladdernoun 1. Also called: swim bladder ichthyology an air-filled sac, lying above the alimentary canal in bony fishes, that regulates buoyancy at different depths by a variation in the pressure of the air 2. any air-filled sac, such as one of the bladders of seaweeds |
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