另一方面，错误是意外的问题——因为我们事先不知道哪里会出错，我们需要分析实际测试运行中的回溯来诊断这种问题。
Errors, on the other hand, are unexpected problems — since we do not know in advance what can go wrong, we need to examine the traceback in the actual test run to diagnose such problems.
另一方面，错误是意外的问题——因为我们事先不知道哪里会出错，我们需要分析实际测试运行中的回溯来诊断这种问题。
Errors, on the other hand, are unexpected problems — since we do not know in advance what can go wrong, we need to examine the traceback in the actual test run to diagnose such problems.
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