antenna length meaning in Chinese

天线长度

Because waves can vary from 18 feet for channel 2 television to three inches for cellular telephony , proper antenna length is key to reception
因为电波波长从第二频道电视用的5 . 5公尺到行动电话用的7 . 6公分都有，所以适当的天线长度正是收讯品质的关键。
Shape features include many global shape features , such as invariance moments , geometric shape features and projection statistical features , and many local shape features , such as the ratio of antenna length and body length and antenna statistical projection feature
形状特征包括不变矩、几何形状特征和投影量统计特征等全局形状特征，以及触角与躯体长度之比、触角统计投影特征等局部形状特征