I was able to track down the source of the problem and had it dealt with already.
我顺藤摸瓜找到了问题的根源，也已经把它解决了。
Though the manager did his best to help, he was still unable to track down the source of the problem.
虽然经理尽了他最大的努力，他还是无法追查到这个问题的来源。
When this happens, your first step is to track down the source of the problem.
发生这种状况时，第一步骤便是追踪搜寻问题的来源。
When this happens, your first step is to track down the source of the problem.
发生这种状况时，第一步骤便是追踪搜寻问题的来源。
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