她给我们看了一个奇怪的玩意儿，样子像碟形卫星信号接收器。
She showed us a strange contraption that looked like a satellite dish.
根据卫星信号，连同轮速传感器输入的速度和仪表所示的方向，即使在汽车移动时也能确定它的位置。
The satellite signals, along with inputs on speed from a wheel-speed sensor and direction from a meter, determine the car's position even as it moves.
旅客：我收不到卫星信号。
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