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Study Music,Concentration,Focus,Brain Power,Meditation,Work Music,Relaxing Music,Study,☯2009-المدة:11ساعةو55دقيقة.

249webm音频只有小114k opus@50k(48000Hz)268.71Mi B 250网络音频只有小131k opus@70k(48000Hz)358.11Mi B 140m4a音频只有小171k m4a_dash容器mp4a.40.2@128k(44100Hz)662.13mi B 251webm音频只有小198k opus@160k(48000Hz)705.22Mi B160mp4256x144p237k avc1.4d400c30fps视频只有422.75mi 278webm256x144144p322k webm容器vp930fps视频仅133mp426x240p418k avc1.4d401530fps视频只有1.12gi 242webm426x240p433k vp930fps视频只有785.10mi 243webm640x360360p677k vp930fps视频只有1.52gi 134mp4640x360360p921k avc1.4d401e30fps视频只有2.46gi 244webm854x480480p1066k vp930fps视频只有3.06gi 135mp4854x480480p1584k avc1.4d401f30fps视频只有4.49gi 247webm1280x720720p2574k vp930fps视频只有7.73gi 136mp41280x720p3140k avc1.4d401f30fps视频只有9.83gi 248webm1920x1080p3915kvp930fps视频只有13.11GiB137mp41920x1080p5863k avc1.64002830fps视频只有19.14gi 18mp4640x360p617k avc1.42001e30fps mp4a.40.2@96k(44100Hz)3.08 GIB(最佳)