Most rule systems group rules in rule sets that are predefined in tools or dynamically composed at run time.

大部分规则系统都将规则分组为规则集，规则集在工具中预定义或在运行时进行动态组合。

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Last month, the company dropped a bombshell, announcing it might spin-off or sell its Personal Systems Group, which sells PC hardware.

上个月，惠普公布了一个举世震惊的消息，宣布可能会剥离或卖掉其销售PC硬件的个人系统集团。

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What's more, says David Keith who directs the University of Calgary's Energy and Environmental Systems Group, it would be pretty easy to do.

而且，卡尔加里大学能源和环境系统小组的负责人大卫·基思说，要这么做很容易。

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Professor Wobbrock says the group's main goal is to make information and computer systems more available and easier to use.

VOA: special.2011.04.18

Now, there are two things that she is left with, in the passage I just read: that sense of San Narciso being all of America, and, moreover, of it being constituted of "storm systems of group suffering and need."

在我刚刚读过的文章中，她留下了两件事：,一是圣弗朗西斯科：,就是整个美国的感觉，二是它作为,“人们承受而，又需要的风暴系统“的一部分“

耶鲁公开课 - 1945年后的美国小说课程节选

On PCs, she says they always called it the personal systems group, not PCs per se.

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Personal Systems Group (PSG) revenue was down 10% year over year with a 4.7% operating margin.

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By 1993 he was running the Network Systems group, which would form the core of Lucent.

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