Racial group identification which manifests itself through a series of cultural factors is a main aspect of the research on the racial groups. Culture is the basis of racial group boundary.

在对族群的研究中，族群认同被视为一个主要的内容，族群认同总是通过一系列的文化要素表现出来，文化是维持族群边界的基础。

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A Group is simply a way to draw a boundary around other elements in a business process model.

Group就是一种在业务流程模型中设定边界隔开其他元素的方法。

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Supposing that the intersection of multi-group fractures is treated as the internal boundary, a boundary Element Method of fracture network seepage flow is obtained.

通过将裂隙之间的交线看作为内部边界，推导了多裂隙相交时的边界单元法公式。

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She commended the Minister for his efforts to preserve the city of St Petersburg through the establishment of an open-ended group of experts to address the delineation of the boundary of the historic centre of the city, as well as to enhance the legal protection of the property with a view to respecting its outstanding universal value.

UNESCO: MEDIA SERVICES

Another group of scientists convened by the International Joint Commission, a U.S.-Canadian agency that deals with boundary waters, is developing recommendations for solving Lake Erie's toxic algae problem.

WSJ: Report predicts ever-bigger Lake Erie algae blooms