This means that you will pass the test only if that particular type of exception is raised in the designated line.

这意味着只有在指定行中抛出特定类型的异常的时候，您才会通过测试。

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Part type - Designated by classification symbol b.

部件类型—由分类符号B指定。

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When you use an object initializer to create an instance of a named type, the default constructor for the class is called, followed by initialization of designated members in the order you specify.

当您使用物件初始设定式来建立具名型别的执行个体时，会呼叫类别的预设建构函式，接著按照您指定的顺序初始化指定的成员。

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