That article outlined existing work in this area, and defined the boundaries of the project.
那篇文章列举了该领域已经进行的工作，并定义了这个项目的边界。
This is a complex area of discussion outside the boundaries of most deployments.
这方面的讨论较为复杂，大多数部署都不会涉及到这方面。
Two area defects are twins and grain boundaries .
有两种面积缺陷，即孪生和晶粒间界。
Two area defects are twins and grain boundaries.
有两种面积缺陷，即孪生和晶粒间界。
Two area defects are twins and grain boundaries.
有两种面积缺陷，即孪生和晶粒间界。
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