acknowledgement tone造句

例句与造句

1. Because the connection between the telephone and the telephone network is two-wire, but the signalling on the international circuit operates on a four-wire basis ( totally separate send and receive paths ), signal-acknowledgement tones ( single pulses of one of the two frequencies from the far end of the circuit after receipt of each digit ) tended to be reflected back at the four-wire / two-wire conversion point.
2. It's difficult to find acknowledgement tone in a sentence. 用acknowledgement tone造句挺难的