Secondly, the second change occurs as passing note or grace note.
第二种，二变以经过式（或辅助式）的装饰音出现；
Secondly, in then second section, there simply introduce basic principles about video analysis.
其次，在第二章中简单介绍了视频分析的基本原理。
Secondly, in then second section, there simply introduce basic principles about video analysis.
其次，在第二章中简单介绍了视频分析的基本原理。
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