| 释义 |
1 ?成本 叶大小与水分条件关系模型:借鉴自经济学中的 收益-成本(benefit-cost)分析法。 平衡蒸腾失水-成本 光合作用产物-益 单位时间内,蒸腾耗水随叶片增大而增大, 光合产物随叶片增大而增加。 2 ?益 叶大小与水分条件关系模型:借鉴自经济学中的 收益-成本(benefit-cost)分析法。 平衡蒸腾失水-成本 光合作用产物-益 单位时间内,蒸腾耗水随叶片增大而增大, 光合产物随叶片增大而增加。
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Results The ratio of benefit-cost in hospital processing products was more than market purchase products, and its NPV of hospital was also higher. 结果医院炮制的效益-成本比大于市场采购的效益-成本比，其净现值也大于市场采购品。 - 2
Benefit-cost analysis — an analysis of the gains and losses of an action which attempts to quantify both the benefit and costs in order to compare them. 成本效益分析——一个在尝试确定效益和成本以对其做出权衡行为的得与失分析。 - 3
Although the risks of offshore drilling are much harder to quantify than the benefits, I believe the shift in the benefit-cost ratio has been large enough so that the time has come to allow drilling. 尽管近海开采的风险量化要比其利益量化困难很多，但是我相信收益成本比已经足够大了，因此是时候允许近海开采了。
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