即使当今的大多数系统无法提供纳秒精度的时间，但是实际值应当至少比用老的方法获得的要好得多。
Even though most of today's systems will not provide times with nanosecond resolution, the actual values should at least be much better than can be obtained with the older method.
通过在分子中增加解决问题花费时间的方法可以获得系统可维护性的一个实际度量单位。
Add the number of hours spent fixing bugs in the numerator to arrive at an actual metric for the maintainability of the system.
系统管理员编写文档花费的时间实际上是浪费了，因为文档完成之后马上就过时了。
Any time spent by a system administrator writing documentation is wasted effort, because the moment the documentation is complete, it is obsolete.
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