In the paper it points out that when the plane model is used to compute the excavation problem, the initial stress of excavation must be modified, and the algorithmic model is shown in the paper.

文中分析了开挖问题采用平面模型计算时，应对开挖初应力进行修正，并给出了算法。

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Dave was making a model plane in the classroom at that time.

那时戴夫正在教室里做模型飞机。

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He told the reporter that when he was unhappy, he wrote the unhappy things on the paper with which he folded a model plane.

他告诉记者，当他不开心的时候，他会把不开心的事情写在折的纸飞机上。

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The agency model for plane tickets is very low-margin and is getting squeezed further by mergers in the airline business (Northwest-Delta, United- Continental, Southwest-AirTran).

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But apart from the minor niggles, Mr Knapp said the Mark IA is in fantastic condition and is the best preserved early model of the fighter plane he has ever seen.

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Louis flying eastward over the ocean, had provided Sandy with the model for the plane in the drawing celebrating his conception.

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