雷达信号接触到飞机的任何部位，都会有部分被反射回来。
No matter where the radar signal hits the plane, some of the signal gets reflected back.
航天飞行器试用雷达和光学传感器来计算彼此距离来完成最后的接触和对接。
The vehicles used radar and optical sensors to compute their proximity to each other and guide their final approach and contact.
雷达天线电机炭刷由于长时间使用磨损严重，接触不良。
The motor carbon brush of radar antenna has been worn seriously due to long time service. It can not touch really.
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