Nutritionists worry about the resulting loss of quality, but there are big gains in quantity.

营养学家们担心这会引起食物营养物质的流失，但是在数量上有很大的收益。

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The loss of the amount of cultivated land includes not only the dominant loss caused by the absolute reduction in quantity, but also the recessive loss caused by the whole quality decrease.

耕地数量的流失不仅包括耕地绝对数量减少导致的显性流失，还包括耕地整体质量下降导致的隐性流失。

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For each test series the samples were maintained according to its own maintaining method and the loss rate of quantity or length expansivity was measured in defined period.

各个试验系列按照各自养护方法进行养护，并在规定龄期测定其质量损失率或长度膨胀率指标。

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