The phrase "a permanent source of" is correct and usable in written English.
It can be used to describe something that consistently provides a particular benefit or resource over time.
Example: "The library serves as a permanent source of knowledge for the community."
Alternatives: "an enduring source of" or "a constant source of".
To deprive children of such a permanent source of pleasure is to damage them.
In linguistically polarised Belgium, the rival tongues are a permanent source of tension.
This strategy requires them to acquire a permanent source of outside capital almost from the beginning.
"But my land is beautiful, it's fertile, and it's a permanent source of income for my family".
Bats are happiest living in easy flying distance of a permanent source of water, especially a marsh or lake.
Endowed gifts provide a permanent source of support for graduate teaching assistantships, securing valuable experiences for these outstanding students.
A new, permanent source of revenue significantly increases Metro's borrowing capacity, giving officials more flexibility to draft one of the most ambitious transit expansion plans in recent U.S. history.
"Think about how much more we could do in California if we had a dedicated permanent source of funding for public transit," Steinberg said in downtown L.A. on Friday.
16 A more permanent source of new keratinocytes appears to be the non-bulge-region follicular cells that make similar-sized contributions to those of cells derived from stem cells outside of the hair follicles.
However, regarding amalgam fillings it is known that they form a potential permanent source of organic-bonded mercury (mainly methyl mercury) which possesses toxic characteristics and in whose formation bacteria of the oral cavity (streptococci) are involved [ 71].
After that, the $5 billion becomes an additional permanent source of discretionary funds for schools that is not subject to the fluctuations of state revenues, according to Tim Gage, a consultant to the committee.
