在各药品连索店和线上，这项测试已经提供给顾客许多年了，但其应用一直受限制，部分原因是它们的准确性不明确。
The tests have been available to consumers in drugstore chains and online for a few years, but their use has been limited, partly because their accuracy was unclear.
甚至可以测试得更加细致一些，可以测试一系列方法来确保它们满足特定的时间限制。
You can even make tests a bit more granular and test a series of methods to ensure they meet a certain time threshold.
由于它们依赖于要进行编码的测试用例、隐藏的接口和多种需要在不同环境中测试的工具，所以这些工具的使用对开发人员常常是有限制的。
Because of their dependence on coded test cases, cryptic interfaces, and the variety of tools necessary to test in different environments, the use of these tools is often limited to developers.
由于它们依赖于要进行编码的测试用例、隐藏的接口和多种需要在不同环境中测试的工具，所以这些工具的使用对开发人员常常是有限制的。
Because of their dependence on coded test cases, cryptic interfaces, and the variety of tools necessary to test in different environments, the use of these tools is often limited to developers.
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