In this example, if you execute the same query two times, you receive a reference to the same object in memory every time.
在这个范例中,如果执行相同的查询两次,则每次都会接收到记忆体中相同物件的参考。
Query interfaces: The query interfaces consist of two models.
查询接口:查询接口由两个模型组成。
Two aspects of this query deserve some explanation.
这个查询有两个方面要解释一下。
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