目的 研究长苞凹舌兰提取物（CE）改善鹅蒿蕈氨酸（IBO）致痴呆大鼠的学习记忆能力并探讨其作用机制。

Objective To study the effect of Coeloglossum viride var. bracteatum extract (CE) on the learning and memory ability in dementia rats by ibotenic acid (IBO), and explore its mechanism.

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结果CE对IBO致痴呆大鼠学习记忆能力有明显的改善作用。

Results ce significantly improved the learning and memory ability in IBO-induced AD-mimic rats.

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给出了一个支持并行工程的计算机辅助夹具自顶向下设计系统，该系统具有支持夹具概念设计和详细设计的能力。

A computer aided fixture design system (CAFDS) for concurrent engineering (ce) is presented, it is able to implement fixture design process from conceptual design to detailed design.

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