Then, the authors analyze the present problems of Chinese R&D investment structure and introduces practices of developed-countries which are valuable for reference, and makes policy suggest…

分析了我国科技投入现存的问题，介绍了发达国家的一些值得借鉴的做法，并提出了相应的政策建议。

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R engine and XR engine are the products produced by our company at present. The paper mainly discussed the technique scheme of setting up a common flexible machining line for R and XR block.

及XR型两种发动机是公司目前在线生产的产品，本文主要探讨建立这两种发动机缸体共用柔性生产线的工艺方案。

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Here, we present a comprehensive R-package for the analysis of biological networks including an exact and a heuristic approach to identify functional modules.

这里，我们提出了一个用于生物学网络分析的综合的R包，包括一个精确的和一个启发式的方式来识别功能模块。

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Generally, if it pays c dollars for every period, the present value is c/r.

推广开来,如果在每段时期内支付c美元,那么它的现值就是c/r

耶鲁公开课 - 金融市场课程节选

Late in the afternoon, he pulled into a Toys R Us to buy a present for his nephew Caiden, who had just turned one.

NEWYORKER: The Strongest Man in the World

Re-deploying US forces, combined with production of transformational systems like the Osprey and the Wave-Piercing Catamaran, are vital to winning future phases of the present global conflict, what former CIA Director and Center for Security Policy National Advisory Advisory Council Chairman R.

CENTERFORSECURITYPOLICY: Redeploying our forces to win World War IV