Sleep Island · Official
人類史のオーディオブック（中国語）
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Stop automatically when you fall asleep · Sleep Island app ↗A Mandarin audiobook on why human societies developed so unevenly over the last 13,000 years, read in full, about 9 hours 22 minutes.
リラックス、入眠
The web player loops the current preview audio. Choose a timer from 15 minutes to 2 hours, or keep it looping; timed playback fades out gently. The timer sets your listening session, not the original track length.
