许多捐赠者没有仔细评估资金的相对长期成本和收益，就匆匆忙忙地投资一些花哨的项目。
Many donators have rushed into fancy programmes without carefully assessing the relative long-term costs and benefits of their money.
管理上的不确定性因素如此的巨大，因而对私人投资者来说核电的赌注太大，特别是这种项目的成本往往远远大于预期。
With so much regulatory uncertainty, that is too big a bet for private investors—especially since projects of this kind often cost more than expected.
理论上，风险投资周期由项目边际增加值和项目边际成本共同确定。
In theory, risk investment cycle is determined by marginal added-value and marginal cost of projects.
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