以下为句子列表：
英文: It appears teens may not be the only frequent users of MP3 players in the future: Medical professionals may one day swap music players for stethoscopes to listen to and record patients' heartbeats and breathing sounds.
中文: MP3不再是年轻人的专利，医护人员可能将音乐播放器转化成用于记录病人心跳和呼吸的听诊器。
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