a data transmission rate; the maximum amount of information (bits/second) that can be transmitted along a channel
bandwidth详细解释
band.width n.（名词）The numerical difference between the upper and lower frequencies of a band of electromagnetic radiation, especially an assigned range of radio frequencies.带宽：电磁辐射频带中高频与低频之间的数值差，尤指某设定的无线电频率范围
