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。
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。
The company plans to make money through a freemium model, where users can pay for premium features like extra storage.
该公司计划通过一个免费增值模式来赚钱，用户可以支付额外的钱来使用高级功能。
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