以前，测试是瀑布式发布计划的最终阶段，在软件开发过程最后进行。
Once upon a time, testing was the final phase of a waterfall-style release plan, undertaken at the end of the software development process.
最后进行了系统测试和试运行。
最后进行了调光器的温度测试，检验了调光器的可实用性。
At last, the thermal test was undertaken, which can validate the practice of this device.
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