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Firstly, we briefly introduce the assembly model, analyze and evaluate the typical assembly model. Secondly, we propose a new-layered assembly model which is based on discrete face. At last, we briefly discuss how to use the DENEB system to abstract the information from the CAD model and how to add constrain information to the DENEB model.

首先，对装配模型进行了简要介绍，并对当前典型的装配模型及其特点进行了介绍和分析；其次，结合本文提出的装配规划算法提出了基于离散面片的层次化装配模型；最后，简要介绍了如何通过DENEB系统对CAD模型中的信息进行抽取以及如何添加约束信息。

On a stage of discussing the virtual teaching reform, a new graphics education system among the Institutions of Technology has been being built up and perfected. The author demonstrated how to evaluate the position where descriptive geometry is and what function descriptive geometry plays when it comes to the changing graphics education system. The author also discussed how to use descriptive geometry to cultivate students' thinking and design capacity.

摘 要：在探讨实质性教学改革阶段，工科院校新的图学教学体系正在不断改进和完善，怎样看待画法几何课程在这个体系中的位置、价值和功能，如何利用画法几何来培养学生的思维能力和设计能力，是否认为CAD技术与画法几何没有必然联系。

In the world the great desideratum is to know how to distinguish yourself; in the kingdom how to extinguish yourself.

为人处世，你最应认识的是你自己，在官场中则以难得糊涂为妙。

How to Start Phone Dialer on your computer, there is a telephone dial-up procedures, you know how to use the procedure to start it?

详细说明：如何启动电话拨号程序在计算机中有一个电话拨号程序你知道怎么用程序启动它吗？

Now I'm going to show you how to create a personal preview dialog and how to use it.

现在，我要告诉你如何创建个人预览对话框，以及如何使用它。

How to say in English translation to allow, how authentic expression in English to allow - Dict.

翻译准许用英语怎么说，如何用英文地道表达准许- Dict。

Disinter the crisis of traditional authority masculine visualize, discuss how to cast away the criterion of man. How to response their instinct demand more freely and come back to themselves which haven't been melted by patriarchy?

发掘出传统男性权威形象潜在的危机，探讨男性如何抛弃传统的男性标准，更自由地回应自己天性中的本能要求，回到未受父权制文化浸染的自我，实现男性的更为人性化的生存。

The chief problem to be solved in training teaching is how to strengthen the construction of training lab and how to resolve the disjunction between lab teaching and site operation.

如何加强实训教学实验室的建设，解决实验教学与现场运行相脱节的情况，是实训教学需要解决的首要问题。

How to use information that is much faster and how to take large volumes of information and distill it down to just exactly what you need.

如何非常快地利用信息；以及如何获得大量的信息并从中提取你所需要的内容。

How to get the optimal set of coins and how to accomplish payment with the set are the keys to solve the divisibility problem.

如何求得最优化的电子现金集合以及如何用该集合来完成支付是解决"可分性"问题的关键。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。