Unverified50% confidenceFactExact time
EPUB 是由国际数字出版论坛（IDPF，现并入 W3C）制定的开放标准，是目前最被广泛支持的非专有电子书格式
1
Sources
50%
Confidence
Long-term
Relevance
8/26/2026
First Seen
Sources
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