In effect, a domain provides a specialized vocabulary. With the base DITA package, you receive the following domains.

实际上，一个域提供一个专门化的词汇表。

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For complete, single-purpose collections such as functional specifications, information plans, and quick reference guides, you might package these specialized topicref elements with a new map type.

对于完整的、用途单一的集合，如功能规范、信息规划和快速参考指南，您可以将这类专门化的topicref元素打包成新的映射类型。

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As the largest express carrier and package delivery company in the world, we are also a leading provider of specialized transportation, logistics, capital, and e-commerce services.

我们是世界上最大的快递承运商与包裹递送公司，也是提供专业运输、物流、资本与电子商务服务的全球领导者。

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