如果应用程序的性能从整体上来看比较差，那么应激活日志记录功能来通过日志消息时间戳识别发生问题的位置。
If your application performs poorly in general, activate logging to try to identify problem areas through log message timestamps.
最终，当运行双胞胎一号COBOL程序时，需要查找并识别第二个双胞胎二号。因此，预编译器给这双胞胎“纹”上修改过的时间戳。
Eventually, when twin 1, the COBOL program, runs, it will need to find and identify twin 2. Therefore, the precompiler "tattoos" each twin with a modified timestamp.
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