编辑过程中，如果没有缓存，则只要输出被预览，更新数据源就会执行。
During editing, without caching, the update feed is executed whenever its output is previewed.
该文档目前可用的输出格式会在预览图像之下列出。
The output formats in which that document is currently available are listed below the preview image.
您可以通过预览大致了解文章或教程最后输出的效果。
You can preview your article, knowledge path, or tutorial to get a general idea of what the final output will look like.
它切换非平衡立体声音频到可选的预览和节目输出。
The unit switches unbalanced stereo audio to the selected preview and program outputs.
介绍一种打印预览实用技术，可实现复杂格式的输出。
It also introduces practical technique of print preview and realizes printing of complicated forms.
介绍一种打印预览实用技术，可实现复杂格式的输出。
It also introduces practical technique of print preview and realizes printing of complicated forms.
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