The result is a profile that is often characteristic of a particular type of reactor or centrifuge, and sometimes of an individual machine—and can also indicate how long ago the processing took place.
这种结果反应出了经常是一种特别类型的核反应堆和离心分离机的特性，有时是独特机器的特性，也能显示这种过程会发生多久。
We have heard about this new type of machine long before.
关于这类新型机器，我们很久以前就听说过。
This type of equipment are generally long-running, or even a long non-stop machine.
这类设备一般都是长时间运行，甚至很久不停机。
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