bladder

中文： 膀胱、囊、球胆

1. A flexible sac that can expand and contract and that holds liquids or gases.
2. Specifically, the urinary bladder.
3. A hollow, inflatable organ of a plant.
4. The inflatable bag inside various balls used in sports, such as footballs and rugby balls.
5. A container in the form of a flexible bag. · a fuel bladder
6. A sealed plastic bag that contains wine and is usually packaged in a cask.
7. Anything inflated, empty, or unsound. (figuratively)

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