带宽dàikuān频带的宽度。在通信中,指某一频带最高频率和最低频率的差(单位是赫兹);在电子计算机网络中,指数据传输能力的大小(单位是比特/秒)。{bandwidth; numerical difference between the hightest and lowest frequencies of a frequency band in telecommunications (unit: hertz); data-transmitting capability in a computer network (unit: bits per second)}