...tation）-集体取向 （collectivity-orientation） 2、社会系统理论 任何行动系统的功能先决条件（functional prerequisites）：结构的功能在于满足系统生存的 必要条件。
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也就是说，如果适当的先决条件成立，可以使用可选功能部件来创建层结构。
In other words, attempt to use optional features as way of creating layers that would be available if the appropriate prerequisites are present.
这是Fix Central的一项功能，包括要与最初所选修复同时下载的先决条件。
This is an important feature of fix Central, the inclusion of requisites for you to download at the same time as the fix you were originally after.
正确快速的识别电子标签的标签号码，是门禁系统发挥其功能的先决条件。
To identify the content of the tag correctly and quickly is the primary condition of the access control system to display its function.
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