They operate as "black boxes"; external components neither know nor care how they perform their function, merely that they return the expected result.
它们就像“黑匣子”一样运行：外部组件既不知道也不关心它们如何执行它们的功能，而仅仅关心它们是否返回期望的结果。
Many search engines take account of the number of links to a website when they return the results of a search.
很多搜索引擎在返回搜索结果一时，都考虑某一网站所获取的链接数。
They return the complete list of TAB IDs and the ID of the first TAB, respectively.
它们分别返回选项卡id的完整列表和第一个选项卡的ID。
They return the complete list of TAB IDs and the ID of the first TAB, respectively.
它们分别返回选项卡id的完整列表和第一个选项卡的ID。
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