设计了一种称之为多晶硅覆盖树技状结构的双极型微波功率晶体管。

A new device structure of silicon bipolar microwave power transistors with so called tree overlay geometry polysilicon emitter has been designed.

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接着详细分析了基于覆盖树算法和化简方法的过程模型的合理性验证，分别利用这两种方法对本文建立的过程模型进行了合理性验证。

And analyses the methods to verify the process model's rationality which is based on overlay tree algorithm and reduction. then the two methods are used to verity the process model of the company.

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他已经种植了5万多棵树，覆盖了133个足球场那么大的面积。

He has planted more than 50,000 trees covering the size of 133 football fields.

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