形容词
中文翻译：无呼吸的
同义词：
['anechoic', 'inert', 'lifeless']
例句：
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1. The room was filled with the sound of silence, a pneumatic chamber that was completely anechoic.
房间里充满了寂静的声音，一个完全无回声的气室。
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2. The anechoic chamber is used to test the performance of loudspeakers and headphones.
无回声室用于测试扬声器和耳机的性能。
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3. The anechoic chamber was designed to minimize the effects of echoes on the recording process.
无回声室的设计旨在最小化回声对录音过程的影响。