Genetically engineered bugs making hydrocarbons more or less from scratch could guarantee consistent quality without the hassle, thus perhaps commanding a premium with no extra effort.

遗传工程培育出的细菌几乎从一开始就能保证它们产出的碳氢化合物的质量一直都很好，省去了麻烦，所以这也许要求额外费用但却无需大费力气。

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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.

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。

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A more sophisticated argument revolves around the equity risk-premium, the extra return investors should demand for holding shares.

一个更为严密的论证考虑了证券的风险溢价，即投资者对持有股票所应要求的额外回报。

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This extra cost is the insurance premium.

VOA: special.2010.05.11

If the option expires worthless, the option premium is extra money in your pocket.

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So, why would anyone want to pay an extra premium to a Medicare Advantage policy for this benefit?

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Some premium systems charge extra because they have so many satellites aloft.

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