An indication of implementation cost in terms of frequency of activity, calendar time, and man-hours per iteration.
指出实施成本根据活动的频率，日历时间，和工时。
2
An indication of its significance may be the frequency with which it has been painted.
这一事件的意义之重大，也许以此为题的绘画频繁出现足以为证。
3
Blind speed phenomenon due to Doppler frequency usually exists in moving target indication radar. This disadvantage affect is avoided through staggered pulse repetition frequency method.