词汇	train of signal
释义	train of signal 信号串
随便看	time periodic potential Time-periodic problem time-periodic solution time period modulation frequency time period of supply time period of urethral catheterization time-period price time period rating time periods time-periods time periods of supply time period time-period time-period assumption time period bidding Time Period Date time period dynamic series time-period dynamic series time period for recovery of investment time per loading time per piece time per point time perspective time per unit time Petrinet