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1. The new wireless router is designed to provide better signal coverage in the house.
这款新的无线路由器设计用来提供更好的家中信号覆盖。
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2. The audio amplifier was installed at the front of the room to improve the sound quality.
音频放大器被安装在房间前面，以提高音质。
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3. The speaker system includes an amplifier that can boost the volume without distorting the sound.
扬声器系统包括一个可以提升音量而不失真的放大器。