AM：作为测试的一部分，你想要能够模拟产品环境的条件并对软件进行压力测试，从而观察是否以及什么时候会失败。

AM: As part of testing, you want to be able to simulate production environment conditions and then stress test the application to see if and when it fails.

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在负载测试中，多个用户同时访问程序，以模拟预期的软件程序使用情况。

In load test, multiple users access the program concurrently to simulate the expected usage of a software program.

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在内心建立用控制反转编写软件的思想，会使得进行单元测试更加容易，因为你可以替换真实实现而在测试中进行模拟。

Writing your software with inversion of control in mind also makes unit testing much, much easier, because you can swap out real implementations for mocks in your tests.

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