A parameterized class lets you base a recordset query on information obtained or calculated at run time.
参数化类使您可以根据运行时获取或计算的信息创建记录集查询。
The square brackets denote a parameterized class in Scala, and in this case, it takes the type of the ID and the type of the actual model class.
在 Scala 中，方括号表示参数化的类；在这里，参数是 ID 的类型和实际模型类的类型。
The idea is to use a single class which can be parameterized to perform different logic without requiring subclassing [...
想法是使用一个可参数化的类执行不同的逻辑，不需要子类化……
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