To select the right level of abstraction is a key service modeling issue.
选择正确的抽象级别是服务建模的一个关键问题。
Each level of data modeling has its own purpose in data warehouse design.
在数据仓库的设计中，数据建模的每一层都有自己的目的。
In process modeling, tasks are the lowest level of activity.
在流程建模中，任务是最低级的活动。
Now let's take a high-level look at each of these key modeling extensions.
现在让我们从高层次上查看一下这些关键的建模扩展功能。
Use case modeling comes in as a second step on a lower level.
用况建模是在更低的层次上作为第二步进行的。
I want to talk a little bit sort of at a general level about modeling.
我想用一些可以说是，最普通的模型构造。
The early researches focus on human modeling and low level motion control technology.
早期虚拟人技术的研究集中在人体建模和底层动作控制技术。
The early researches focus on human modeling and low level motion control technology.
早期虚拟人技术的研究集中在人体建模和底层动作控制技术。
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