Noise-reducing circuitry must be turned on to listen to your music.听音乐时，一定要把降噪电路系统打开。The computer's entire circuitry was on a single board.这种计算机的整个电路系统都在一块单板上。The circuitry in this fighter aircraft has been protected against strong magnetic fields.这架战斗机的电路系统有防护装置，不会受强磁场的干扰。