名词
中文翻译：回声
同义词：
['reverberation', 'resonant', 'murmur']
例句：
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1. The echo of the footsteps could be heard for miles.
脚步声的回声可以传得很远。
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2. The echo of her laughter reached us even from across the room.
她的笑声甚至从房间的另一头传来。
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3. The echo of the ocean waves was soothing to the ears.
海浪的声音令人心旷神怡。