面向对象的工程能够比较容易的从内部代码设计跟踪到功能设计和需求。
Well-engineered object-oriented design can make it easier to trace from code to internal design to functional design to requirements.
和机械对象不同，你不能只通过跟踪虚拟的杠杆与其他机械的关系，而知道其实际功能。
Unlike mechanical objects, you can't figure out a virtual lever's function just by tracing its connections to other mechanisms-software can't be casually inspected in this manner.
研究对象是基于视频的人体运动功能分析技术，即在视频序列中对人体的运动进行跟踪、捕捉和分析。
The object researched in this thesis is video-based human motion analysis that track, capture and analyze human motion in monocular video.
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