repetitionn.重复；反复repetition-rate laser重复率激光repetition rate control重复频率控制repetition rate of pulse脉冲重复频率repetition help learning重复有助于学习repetition complementing重复映衬repetition rate generator重复频率发生器repetition-rate divider重复(频率)分频器repetition gravity survey重复重力观测repetition priming effect重复启动效应repetitional regeneration重复再生