By optimizing the parameters of the patch and the feed position, the bow-tie microstrip can operate well on dual frequencies.
最后对双频蝶形微带天线的贴片参数与馈电位置综合进行了优化，使之准确实现双频工作。
He works the lathe with a bow in his right hand and guides the chisel with his left foot, and thanks to a lifetime of sitting in this position his left leg is warped out of shape.
他右手拿着一张弓，左脚操纵着一只凿子。由于长时间地以这个坐姿坐在这个位置上，他的左腿已经扭曲变形了。
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