help me change this paragraph to english 具体而言在设计中为了使电路单元具有较高的非线性特性不同工作区域的特性被low threshold voltage transistor M2 被采用为了使其工作在饱和区while high threshold voltage transistor M3工作在亚阈值区。

Specifically, in the design, in order to achieve high non-linear characteristics of the circuit unit, the characteristics of different operating regions are adopted by the low threshold voltage transistor M2 to operate in the saturation region, while the high threshold voltage transistor M3 operates in the sub-threshold region.