air cushion
参考词典中air cushion的常规释义：
基本释义
- n.气垫,气室
英英解释
3个名词解释
- the trapped air that supports a hovercraft a short distance above the water or ground
- a mechanical device using confined air to absorb the shock of motion
[同] air cushion, air spring
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- a cushion usually made of rubber or plastic that can be inflated
[同] inflatable cushion, air cushion
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