Listing 2's implementation runs in o (n) time. I won't prove this, but the running time of Listing 1's naive, recursive implementation is exponential in n.

清单2中的实现所需的时间比清单1短许多，清单2的运行时间为O (n)，而清单1中的递归实现的运行时间是n的指数。

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Figure 1 shows the n-tier layered architecture for service implementation and where these patterns are applied.

图1显示了服务实现的n层分层体系结构以及这些模式的应用位置。

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The N-layer platform structure is presented and discussed in detail, especially the key design pattern, some difficulties and the technical implementation method.

本文还重点介绍了该平台的N层体系架构，特别对其中的难点和关键的设计思想，及其实现的技术路线进行了详细的探讨和说明。

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"Since then they actually launched a charm offensive, a peace offensive, to the outside, I think they felt some pain coming from the implementation of the U.N.

VOA: standard.2009.12.08

He noted the United States and its negotiating partners in the so-called P5-plus-1 talks with Iran seek implementation of U.N.

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The project was approved by the Global Environment Facility last week at a conference for the Review of the Implementation of the U.N.

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From the current members' perspective, addressing China's views earlier within a G9 rather than later would smooth the implementation of subsequent policies through international bodies such as the U.N. and the IMF.

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