The intrinsic frequency of a beaker can be determined by means of direct determination, resonance or water drip modulation, and each of the methods makes use of the Lissajous figure.
烧杯的固有频率可以用直接测量法、共振法或水滴流调制法加以测定，各法中均利用利萨如图形。
The effects of irrigation frequency and soil matric potential on potato growth and water use efficiency(WUE) under drip irrigation in North China were studied.
研究了滴灌灌溉频率和土壤水势对马铃薯生长和水分利用效率的影响。
The function of drip irrigation frequency, drip irrigation quota and crop yields, irrigation water productivity is established through the experiment values and data analysis.
通过试验及分析建立了春小麦滴灌次数、滴灌定额与作物产量及灌溉水分生产率的函数关系。
The soil temperature under the high-frequency drip irrigation during the growing stages was lower, and cotton roots distributed mainly in the upper soil.
各生育阶段高频滴灌的土壤温度比对照低，而且根系分布浅。
The soil temperature under the high-frequency drip irrigation during the growing stages was lower, and cotton roots distributed mainly in the upper soil.
各生育阶段高频滴灌的土壤温度比对照低，而且根系分布浅。
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