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1·Neither Eular circuit nor Eular path exists in this graph, since there are more than two vertices with odd degree.

这个图既没有欧拉回路，也没有欧拉路径。因为有超过两个顶点的度数为奇数。

2·Neither the CAD methods for microwave circuit nor that for general electronics are not so applicable.

因此，无论是微波电路CAD的常用方法还是一般电路CAD的常用方法对射频前端关键电路都不适用。

3·The SR Flip-Flop is a circuit with two cross-coupled NOR gates or two cross-coupled NAND gates.

标记有两种状态，而且是一个触发器的软件模拟。