通常来说，一张EP的音乐时长大约是10到28分钟，单曲不超过10分钟，而专辑一般都会容纳30到80分钟的音乐。
Usually, an EP has around 10-28 minutes of music, a single has up to 10 minutes, and an album generally has 30-80 minutes.
研究证明，四名被试经可视音乐治疗后，音调、响度、语句时长控制这三个方面均有了极其显著的进步。
Research shows that they get an extremely significant progress on pitch, loudness, length of sentences after visual music therapy.
研究证明，四名被试经可视音乐治疗后，音调、响度、语句时长控制这三个方面均有了极其显著的进步。
Research shows that they get an extremely significant progress on pitch, loudness, length of sentences after visual music therapy.
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