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"Only when a system possesses natural or artificial boundaries that associate the water within it the hydrologic cycle may the entire system properly be termed hydrogeologic."

I am trying to split this compound sentence into three simple sentences like these,

1, A system possesses natural or artificial boundaries.

2, boundaries associate the water within it (?).

3, The entire system may properly be termed hydrogeologic.

Is that right?

If it's, what happened to ' the hydrologic cycle '? I hope it would be a typo.

And what it in "within it" refers to?
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Jeff, could you check the transcript?
the water within it the hydrologic cycle may


It looks to me as though "it" may not be neccessary here,which might help.
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You are right abbie1948, the sentence is incorrect. Either "it" has to be omitted or changed to "its"(in this case, the "the" has to be omitted). e.g.

"Only when a system possesses natural or artificial boundaries that associate the water within ITS hydrologic cycle may the entire system properly be termed hydrogeologic."
That sounds more likely, and I think it will make it much easier to convert into shorter sentences, and still reatain the info about the hydrological cycle. (not that I know what that is!)
Thanks. I concur with you two. The transcript I got does have some errors.
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