What's more, grades are not only an educational device but are also part of a screening system to help assign kids to their next class or program.

更重要的是，分数不仅是一种教育手段，也是一个筛选系统的一部分，帮助我们把孩子分配到他们的下一个班级或课程。

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Pulp and can be used as a screening system, the machine can also be used to pre-select Paste.

即可用作制浆系统的筛选，也可用于纸机前精选浆料。

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Even a skilled, well practised suspect who is aware of the system and who tries to prepare for the screening cannot know where the stimuli will come from and how they will appear.

就算是一名有经验的、受过良好训练的、知道这个系统的存在并对显示屏作好了心理准备的嫌疑人，也不知道刺激物将会来自何处以及它们会是什么样子。

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"I firmly believe in the whole body imaging system as a screening device, " Charlotte Bryan said.

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The Organ Procurement and Transplantation Network, a public-private partnership that sets nationalpolicies for organ allocation and screening, and the United Network for Organ Sharing, which operates the system, are formulating a policy for living-donor screening that would keep patients safe without compromising organ availability, said Connie L. Davis, who chairs the panel working on the policy.

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As revealed last year, the US Department of Homeland Security is working on a system called FAST (Future Attribute Screening Technology) that relies on an array of sensors and advanced algorithms to detect physiological and behavioral cues that are said to indicate malintent.

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