... frequency of injuries 负伤频率 frequency of irrigation 灌水次数 frequency of joints 节理密度,节理频度 ...
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The irrigating water quota , number of irrigation and frequency of irrigation , which is sure to provide the water in time to the forage grass field and get highly stable yield .
为保证饲草料地土壤水分的适时供给并获得稳产高产所确定的灌溉定额，灌水次数和灌水时间。
Irrigation frequency also changed the spatial distribution and storage of soil water.
灌水频率可改变土壤水分的空间分布和土壤蓄水量。
Rainfall frequency analysis is used commonly to determine probability of irrigation water requirement, and to choose typical years for irrigation project design.
灌区灌溉设计中，常用降雨量进行频率分析来选取灌溉设计保证率及其对应典型年。
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