I've been doing this job for 25 years, and I tell you you're going to stuff it up doing things this way.
我干了这工作已有25年了,告诉你,你这样做事情,会把事情办糟的。
This ran on an 'operating system' called DOS, produced by a then small company named Microsoft.
这种电脑采用了一种被称为磁盘操作系统(DOS)的工作程序,而这种程序是由当时规模不大的微软公司生产的。