描述实验结果一律要用过去时态。

Describe experimental results uniformly in the past tense.

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可以在实验室完成对模型系统的控制实验，进行控制律的研究。

We can complete its control experiments in the laboratory, and do research on control rules.

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推导了压路机的动态试验的模型律，并完成了相应的模型动态实验，证明有良好的精度。

We have derived the model laws for the dynamic model experiments, finished the dynamic test of the model and gotten good accuracy.

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