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1. Theamplifier valve is responsible for amplifying the signal.
放大器阀门负责放大信号。
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2. The amplifier valve was designedto improve the sound quality of the music.
放大器阀门被设计来提高音乐的音质。
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3. The amplifier valve is anessential component in the audio system.
放大器阀门是音频系统的一个必不可少的组件。