back annotation 逆向注解back channel 反向通道，反向信道back electromotive force 反电动势back filling 倒填入back light 背景照明back panel 背板back ripple current 逆向脉动电流back, loop 回环back-annotate 后端注释back-end 后端back-off, bus 总线退出back-scattering 反向散射back-to-back testing 背对背测试backbone cabling 主干线布线，主干布线backbone network 中枢网络backbone network architecture (BNA) 中枢网络结构background 背景background acquisition 背景采集backplane 底板；背板；基架backplane bus 基架总线backplane transceiver logic (BTL) 基架收发器逻辑back
