specifying constraint meaning in English

给定约束条件

You could specify constraints within the xml document s
可以在xml文档的
Specify constraints from the application layer to the application hosting layer and vice versa
指定从应用程序层到应用程序承载层的约束，反之亦然。
Gets the metadata associated with the generic parameter constraint represented by the specified constraint token
获取与指定的泛型参数约束标记关联的元数据。
Checks the integrity of a specified constraint or all constraints on a specified table in the current database
检查当前数据库中指定表上的指定约束或所有约束的完整性。
Clause is used to specify constraints on the types that can be used as arguments for a type parameter defined in a generic declaration
子句用于指定类型约束，这些约束可以作为泛型声明中定义的类型参数的变量。

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