他说原型机的模型被装在一个黑色的塑料外壳中，因此无法窥见其中设计。
His model, he said, was sheathed in a black plastic shell, so he did not see its design.
经过大量的迭代完善经过测试的设计计划，从低保真模型逐渐过渡到可以在电脑运行的高保真原型。
Refine the design ideas that test best through multiple iterations, gradually moving from low-fidelity prototyping to high-fidelity representations that run on the computer.
这个说明将描述如何根据场景设计、开发这个原型模型并描述将用于评估的指标，“基于场景的poc评估”小节将详细介绍这个说明。
The description on how the prototype model is to be designed, developed based on scenario and metrics to be evaluated are presented in the section, "scenario based PoC evaluation".
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