柯林斯詞典amplifier /??mpl??fa??/ (amplifiers) 1. N-COUNT An amplifier is an electronic device in a radio or stereo system that causes sounds or signals to get louder. 擴(kuò)音器 返回 amplifier劍橋詞典an electrical device that makes sounds louder 擴(kuò)音器，揚聲器 返回 amplifier