名词
中文翻译：水晶耳机
同义词：
['水晶耳塞，水晶耳机例句：1. I bought a crystal earphone for my birthday', "and it's amazing how much better I can hear now.（我生日时买了一副水晶耳机，现在听东西感觉好多了。）"]
例句：
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1. I bought a crystal earphone for my birthday, and it's amazing how much better I can hear now.
我生日时买了一副水晶耳机，现在听东西感觉好多了。
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2. The concert was so loud that the crystal earphones were almost useless.
音乐会的声音太大了，几乎用不上水晶耳机。
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3. She decided to upgrade her old set of crystal earphones to a newer model for better sound quality.
她决定升级她的旧水晶耳机到一个新的，以获得更好的音质。