其中一些属性指向文字值（比如名称），另一些则指向其他对象[比如专用名词（DN）指定的工作地点]。
Some of these properties point to literal values (like names) while others point to other objects [like work locations specified by distinguished names (DN)].
参与者名称通常是单数名词，譬如，年级管理员、客户以及支付出纳员。
Actor names are usually singular nouns such as Grade Administrator, Customer, and Payment Processor.
抽象名词就是能想象但是不能摸到的东西的名称。
Well, it's the name of a thing which you can think of but cannot touch.
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