Water quality is the key to guarantee quality of grain and soil.
在灌溉中水质是保证粮食和土地质量的非常关键的问题。
We mustn't waste a drop of water or a grain of rice.
一滴水一粒米我们都不应当浪费。
Laboratory fill test: fill water content, grain analysis and specific gravity test were tested.
填土的室内试验：填土含水量测定、颗粒分析和比重测定。
Laboratory fill test: fill water content, grain analysis and specific gravity test were tested.
填土的室内试验：填土含水量测定、颗粒分析和比重测定。
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