In theory, risk investment cycle is determined by marginal added-value and marginal cost of projects.

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。

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In the middle-late stages of production, as the deepening of the oil field development, the marginal operation output decrease, the cost increases, and the investment increase, too.

在油田开采中后期，随着油田开发程度的加深，措施作业边际产量递减，措施作业边际费用递增，措施作业增量边际成本递增。

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Results The marginal seating of the casting without ring investment had significant difference compared with the castings with ring investment ( P< 0.05).

结果无圈包埋组铸件的边缘适合性与有圈包埋组相比有显著性差异（P< 0 .0 5 ）。

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When the marginal return on investment from acquisitions risks being low, distributions to shareholders should be more substantial, Peris says.

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And has so far been, at best, marginal with its big China investment, right?

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And, they calculate that the marginal effective tax rate on investment by a U.S. firm in a low-tax country is, remarkably, a negative 24 percent.

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