A "tornado outbreak" is often defined as six or more tornadoes produced by the same weather system within a day.

VOA: special.2010.05.11

Then we realize once again that we can only know what it is if we come to understand--in this case, probably, it's best to say a cultural system, understood as a semiosis, within which it appears.

这样我们就又明白了,只有在一个特定的文化系统中,我们才能认识一个符号。

耶鲁公开课 - 文学理论导论课程节选

Whatever the convention is within a system of differences, that's what makes the sign intelligible.

这些惯例存在于一个有差别的系统中，这就让符号变得有意义了。

耶鲁公开课 - 文学理论导论课程节选

Unfortunately, traditional endpoint security techniques are not designed to understand the logic behind these attacks the clandestine activity occurring within system processes, those subtle changes necessary to spot potentially bad behavior.

FORBES: To Stop Cybercrime: Understand Crime Logic, And Adapt

And so the size of the system has started to blur the responsibility within the system.

NPR: Intelligence Failures In 'Top Secret America'

So as a result of that, you know Michael mi--there's been an identification to an extent with Michael through his music and through his artistry, and also there's a sense, when we come back to the criminal justice system, that Michael's troubles within the system are at least in part brought on because Michael is still, despite what many think, still an African-American.

NPR: Reactions to the Michael Jackson Verdict