signalledadj.信号的；预示的；告知的动词signal的过去式和过去分词.signaln.信号；标志v.(发信号)通知、表示adj.显著的signal with flags用旗子当信号signalling layout信号机布局signal delay time信号滞留时间,信号迟延时间Signal broadening信号展宽signaling in band带内振铃signal flow graph信号流程图signal back light信号背光signal collection信号采集signal calibrator信号校正器Signal generators信号发生器