尽管我们如此努力劳作，水果的产量仍然很低，因为那里缺水。
Even though we worked so hard, the production level of fruit was still low because it was short of water there.
在一个更现实的试验中，人为地在作物的逆风处喷洒二氧化碳，结果产量增加很低。
More realistic experiments using carefully contrived sprays of CO2 upwind of crops show a much lower bonus.
以前的产量是很多，但是价格很低。
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