BACKGROUND: Cholinergic system projected in brain and hippocampal structure is relevant with learning and memory.

背景：脑内投射至海马结构的胆碱能系统与学习记忆有关。

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Background images applied with the Grid system can now be projected onto your model for a painted guide in your newest creations.

背景图像应用网格系统现在可以投射在你的模型为指导你的最新创作的画。

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The foreign scholars have researched the projected for many years and formed an integrated system, but they have not experience to cope with the risk in different economics background.

国外学者们已经研究多年并已经形成了一套完整的体系，但资产证券化发行机构和它们的投资者还没有积累起在不同经济背景下应对风险的经验。

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The first shows a user's hands on a traditional hardware keyboard projected in an on-screen representation (as background, Apple mentions the ergonomic strain of looking down to check your hand placement, so perhaps that's the thinking behind this one).

ENGADGET: Apple patent application details method for detecting and displaying hand position on screen