The phrase "a valuable portion of" is correct and usable in written English.
It can be used when referring to an important or significant part of something, such as a resource, information, or contribution.
Example: "The research provided a valuable portion of the data needed for our analysis."
Alternatives: "an important part of" or "a significant segment of".
The destruction of the National Museum of Iraq is a tragedy not only for the Iraqi people, who have lost an immeasurably valuable portion of their national heritage, but also for humanity as a whole.
And while this service is helpfulto scared execs facing hard time, perhaps the most valuable portion of Levine's (and other prison consultants') curriculum is how to shorten a sentence.
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In fact, new teachers often point to their field experiences as the most influential and valuable portions of their teacher preparation [30].
In an amended, April 10 version of a complaint they filed last year, they said they believe that the acquisition "designed to unlawfully divest Bear Stearns' public stockholders of a large portion of valuable assets of the company for grossly inadequate consideration," and are calling for the merger to be dissolved.
BERLIN — The European Commission is poised this week to back a plan that would divert a portion of the valuable broadcast spectrum used by television stations to mobile operators by 2013, in a bid to create an European Union-wide market for wireless broadband services.
That may cause him to sell valuable assets, including a portion of his ownership in the Mets.
The community deserves further research focus as it may provide early warning signs of climate change and because it contains a large portion of the valuable timber tree P. angolensis.
"At the same time, we are disappointed that a significant portion of this valuable spectrum will be encumbered with mandates that could significantly reduce the number of interested bidders.
