在几天的测试中，指示器或跟踪器跟踪一个红外光源，并引导激光束击中目标。
During tests over several days, the pointer or tracker tracked an IR source and directed a laser beam at that source.
模仿对象符合实际对象的接口，但只要有足够的代码来“欺骗”测试对象并跟踪其行为。
A mock object conforms to the interface of the real object, but has just enough code to fool the tested object and track its behavior.
密切记录架构变更，并构建测试过程来跟踪那些变更。
Keep close records of changes to the architecture, and build test procedures to keep track of those changes.
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