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SMIL 3.0 Timing and Synchronization
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日期：2025-10-03
The SMIL 3.0 specification leaves the basic syntax and semantics of the SMIL 2.1
... Wallclock-sync-value: Describes the element begin as a real-world clock time.
... Unlike with HTML, user agents should not require that a modifier key (such as ...看更多
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