air bladder
短语[医] 气囊, 气泡
词形变化
air bladders
复数
air bladders
释义与例句
n.
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1.
An internal organ that fish use to control their buoyancy, allowing them to maintain or change depth by changing their density.
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2.
A type of packing material that consists of an airtight bag full of air, used to cushion fragile items.