It has an empty content model because of its empty xs: sequence element.

它有一个空的内容模型，因为它的xs：sequence元素为空。

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Shot change means scene content change in a video sequence.

镜头变化是指视频序列中场景内容的变化。

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Shot change means scene content change in a video sequence.

镜头变化是指视频序列中场景内容的变化。

youdao