如果两个执行个体只宣告非索引键属性，但名称、型别、顺序和值都相等，则这两个执行个体还是不相等。
Only properties you designate as key properties participate in tests of equality between anonymous type instances, or calculation of hash code values.
一个全局反向索引仅仅是一个设计，其中创建的映射的键是搜索关键词，且其值是包含属性与搜索关键词的键列表。
A global reverse index is simply a design where you create a map whose key is the search term, and the value is the list of keys containing an attribute with that search term.
包含作为实体类型属性的外部索引键资料行。
在每个索引键中，这些属性的名称及其出现的顺序都必须相同。
The names of the properties, and the order in which they occur, must be identical in each key.
在每个索引键中，这些属性的名称及其出现的顺序都必须相同。
The names of the properties, and the order in which they occur, must be identical in each key.
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