阶背式轿车队列的平均减阻率最大。

The drag reduction of the notchback car platoon is the most.

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我调整了图片的色阶，也使用了加深减淡工具来获得轮廓树的效果。

I adjusted the level of the images as well as used the burn and dodge tool to get the silhouette look.

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论文采用分数阶保持器(FROH)代替传统的零阶保持器(ZOH)，对减摇鳍系统进行数字控制设计。

This paper USES fractional order hold (FROH) to replace the traditional zero-order hold (ZOH), designs a numerical control system for the fin.

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