Meanwhile, Smith worked a position called the " warden's laundry boy" for 30 cents day.

与此同时，史密斯在一个名为“监狱长的洗衣工”的职位上工作，每天 30 美分。

By measuring the time taken for the reflected signal to return it is possible to work out the position of an aircraft.

通过测量被反射信号返回雷达所需的时间，就有可能计算出飞行器的位置。

Modern radar is highly sophisticated but it largely relies on emitting a signal. By measuring the time taken for the reflected signal to return it is possible to work out the position of an aircraft.

现代雷达极其复杂，但主要还是靠自己发出信号。通过测量被反射信号返回雷达所需的时间，就有可能计算出飞行器的位置。