然后他拿起粉笔在黑板上画了一个三角形的物体。

Then he took a piece of chalk and drew something triangular on the blackboard.

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文章以一个三角形的物体为目标，对所提出的方法进行了仿真试验，结果证实了这种识别方法的有效性。

In this paper, computer simulation experiments of recognition and tracking of a triangle object have been done and the results demonstrate that the proposed scene recognition method is very effective.

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还采用一个三角形的物体为目标，对所提出的方法进行了仿真试验，结果证实了这种识别方法的有效性。

Computer simulation experiments of recognition and tracking of a triangle object has been done and the results demonstrate that the proposed scene recognition method is very effective.

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