To simplify means to choose those elements of the system that are worth including and those that should be discarded.

简化意味着要选择系统中需要包括的那些成分，和应该抛开的那些成分。

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SV-6 System Information Exchange Matrix Details information exchanges between system elements, including applications and hardware allocated to those elements. Model resident text matrix

SV-6 系统信息交换矩阵 详细说明系统要素之间的信息交换，包括应用程序和分配给那些要素的硬件。

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Using these attributes, an element may refer to one or more other elements (by including the value of those elements' ID fields in the pointing element's own IDREF or IDREFS field).

通过使用这些属性，元素可以引用一个或多个其它元素(通过在指向元素自己的IDREF或idrefs域中包含那些元素的标识字段的值)。

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Russia has been menacing its East European neighbors, including those, like Poland, that have offered to host elements of a NATO missile-defense system to protect Europe.

WSJ: Eliot Cohen: American Withdrawal and World Disorder