You edit a specific keyframe of a node by moving the time marker to the time of the keyframe and selecting the node.
如果你要编辑一个关键帧，你要先选中节点，然后把时间标记移动到关键帧的时间点上。
Time marker-based comment system. Pause the video at an interesting moment and add your comment, and it will appear as that frame is displayed on playback.
基于时间标记的评论系统，可以把录像暂停在某个有趣的时刻，添加评论，这些评论在回放时就会出现。
Based on real time clock of GPS system, and by means of absolute time-marker, real time data acquisition between different sites was performed in the form of wireless.
以GPS系统实时时钟为基础，通过对绝对时标加以处理，以无线方式实现了不同站点之间的实时数据采集。
Based on real time clock of GPS system, and by means of absolute time-marker, real time data acquisition between different sites was performed in the form of wireless.
以GPS系统实时时钟为基础，通过对绝对时标加以处理，以无线方式实现了不同站点之间的实时数据采集。
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