作为对持续下跌的市场的额外预防措施，Narayanan建议建立“安全系数”：一个超过最低预期资本回收率3% - 5%的溢价。
As an extra precaution against an ongoing down market, Narayanan suggests building in a "margin of safety" : a 3 to 5 percent premium over the target hurdle rate.
方法对三种消化方法检测的8份尿样中碘含量结果的变异系数及加标回收率进行比较分析。
Method Determine the varying factors and recovery rate of results obtained from 8 samples using three different digesting methods.
该法操作简单，测定结果准确。 该法的变异系数为052％，回收率为9997％。
The process is of easy operation and accurate results with 0.52% coefficient of variation and 99.97% recovery.
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