单词：sound barrier
sound barrier的用法和样例：
例句
- Only this military aircraft is able to break the sound barrier.只有这架军用飞机能够突破声障。
- An added voltage is necessary to overcome the barrier thus created.必须增加一个附加电压去克服这样引起的位垒。
- She raised between them a barrier impenetrable as a wall.她就在他们之间垒起一道不能越过的界线，象一堵墙一般。
- Another flight of jets exploded through sound.又一队喷气机雷鸣般地突破了音障。
- If one feels those around him have become too noisy, a sound block device can be activated and soundproofing will immediately go into effect.如今只要是公共场所，都设有声音调控器，如果嫌别人太吵，开启音障设备即可隔音。
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