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sound (n)/saʊnd//saʊnd/Vibrations that travel through the air or another medium and can be heard when they reach a person's or animal's ear.âm thanh  She stood completely still, not making a sound. Sound waves vary in frequency and amplitude, giving rise to different tones and volumes. The study of acoustics explores the principles and properties of sound. Từ vựng khác:reservation , postal , request , sunshine , stress |