It is the key point to save power and prolong the lifetime of network in the research of wireless sensor network.

从而设计能够有效节约能源，延长网络生命周期的路由协议成为了无线传感器网络研究的一个重点。

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The simulation results indicate that, compared with LEACH, LEACHID extends the lifetime of network, delays the first nodes death time, and enhances the energy efficiency.

仿真实验结果表明，LEACHID协议与LEACH协议相比延长了网络寿命，推迟了第一个死亡节点出现的时间，提高了能量利用率。

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That conversation took place more than 20 years ago and led to the creation of a nonprofit organization called the Planned Lifetime Advocacy Network, or PLAN. Etmanski is the organization's president.

艾特马斯基和那三位男士的谈话已是20年前的事了，但是从那以后，艾特马斯基就成立了一个名叫“计划终身赞助群体”或叫做“PLAN”的非盈利组织，并担任这个组织的总负责人。

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As the sole customer for the two engines, the government must cover all the costs of designing a second engine, developing and testing it, equipping and manning a second production line, funding a second supplier network, and sustaining a parallel maintenance and support infrastructure across the lifetime of the program.

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