Results show that mass area ratio (mar) is a primary factor to average daily efficiency and instantaneous efficiency curve of tubular solar water heaters is not straight line.

结果表明，水量配比(MAR)是影响日平均效率的主要因素；真空管式太阳热水器的瞬时效率不是线性分布。

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Instantaneous efficiency and daily average efficiency of evacuated tubular solar heater waters are contrasted with theoretical values by model of calculation and experimental data.

利用模型计算值和实验值对真空管式太阳热水器的瞬时效率、日平均效率进行了比较分析，结果表明所建立的计算模型总体上是成功的。

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The result showed that: trace-lysine-chelates are excellent nutritive feed additives, trace-lysine-chelate significantly increased average daily gain by 6.4% and improved feed efficiency by 7.0%.

结果表明：微量元素赖氨酸螯合物是优良的营养性饲料添加剂，可提高日增重6.4%，改善饲料效率7.0%。

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