形容词
中文翻译：空气的
同义词：
['airborne', 'aerial', 'aerodynamic']
例句：
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1. The pneumatictire is designed to provide better tractionon rough terrain.
这种充气轮胎设计用于在崎岖地形上提供更好的牵引力。
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2.The aircraft used for the mission was equippedwith advanced pneumatic systems.
执行任务的飞机配备了先进的气动系统。
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3. Thepneumatic tubes were usedto deliver urgent messages during World War II.
二战期间，人们使用气囊管来传递紧急信息。