numerical signal

例句：

1. 1. The engineer used anumerical signal to control the machine.
   工程师使用一个数值信号来控制机器。
2. 2. The digitalsignal was transmitted over the internet.
   数字信号通过互联网传输。
3. 3. The numerical signal was processedby a computer program.
   数值信号被一个计算机程序处理。