Node Comment 节点注释
If you need to show them, you should call this method and visit each comment node individually.
如果需要显示注释,应该调用该方法来单独访问每个注释节点。
It USES any comment data stored in the node object to theme the content fragments required before storing these back in the node object.
它使用节点对象中存储的任何评论数据对内容片段进行主题化,然后将结果存储回节点对象中。
Comment type node test (' comment ') and PI type node test (' processing-instruction ').
评论类型节点测试(‘comment’)和PI类型节点测试(‘processing - instruction ’)。
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