短语词组短语repetition -rate generator 重复频率发生器repetition n rate 复现率high repetition -rate SLR 高重复率卫星激光测距low -repetition-rate 低重复频率high -repetition-rate potical pulse 高重复率光学脉冲highly -repetition-rate slr 高重复率卫星激光测距 返回 repetition rate