You can declare and initialize a test variable, set its scope, and change its value.

您可以声明并初始化一个测试变量，设置它的范围，并更改它的值。

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First, the test recorder will initialize.

首先，测试记录器将初始化。

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For instance, suppose each test in the class USES a database connection, a network connection, a very large data structure, or some other resource that's expensive to initialize or dispose of.

例如，假设类中的每个测试都使用一个数据库连接、一个网络连接、一个非常大的数据结构，或者还有一些对于初始化和事情安排来说比较昂贵的其他资源。

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