系统保留（system reserved）的 IO地址空间，这些是您可用的地址范围。
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reserved cooling system 备用冷却系统
Reserved for system 留作系统
reserved funds system 公积金制度
Up to 20 GB of hard drive is reserved for system recovery software.
ENGADGET: HP's Pavilion dv6 and dv7 get Envy-like features, g-series loses the bargain basement looks
The remaining top 20 percent of the screen is reserved for access to the system menu.
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The framers of our country designed a federal system of certain responsibilities for the federal government and others reserved to the states.
WHITEHOUSE: State Dining Room
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