System demand leads to system supply.

制度需求引致制度供给。

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The system analysis stage mainly showed the system demand analysis, the development kit choice and the environment disposition.

系统分析阶段主要说明了系统的需求分析，开发工具的选择和环境的配置。

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A sleep function allows the drives to be cycled off when the system demand drops below a preset level, and restarted automatically when the demand increases.

睡眠功能允许驱动在系统需求降到一个预设级别之下的时候就停止运行，而当需求增加的时候又自动重新启动。

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Rising costs and an aging population also put extra demand on the system,and this worries health providers, says Kersting.

VOA: standard.2009.09.28

Therefore, reducing the demand of this customer does not result in generation elsewhere on the system being made available to serve increased system demand.

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Certainly, what the Cassini data has done is thrust Enceladus up the interest index of objects in the Solar System that demand further investigation.

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Mr Brown said the policy had "no place in today's housing system where demand for social homes continues to outstrip supply by some distance".

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