Before you can create the EMF model, you need at least one DB2 trace file.
在创建emf模型之前，您至少需要一个DB 2跟踪文件。
This sort of hierarchical relationship is difficult to trace by just navigating through the model.
仅仅通过模型导航很难追踪这类层次关系。
The model could approximate to the trace surface by given accuracy.
该模型可以按给定精度要求逼近测头中心轨迹曲面。
Especially, it made a deep research for turn-left car trace model.
尤其对左转车辆轨迹模型进行了深入研究。
Especially, it made a deep research for turn-left car trace model.
尤其对左转车辆轨迹模型进行了深入研究。
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