The phrase "are constantly being revised" is correct and usable in written English.
It can be used when discussing documents, policies, or any materials that undergo regular updates or changes.
Example: "The guidelines for the project are constantly being revised to reflect the latest research and feedback from the team."
Alternatives: "are regularly updated" or "are continually modified."
That is understandable, however, since copyright laws are constantly being revised and each revision has made for increased complexity.
But how do we work it out given that life expectancy figures are constantly being revised upwards?
In a world moving at Internet speed, a customer's objectives are constantly being revised, so programmers have to be able to hit a moving target.
The study of dinosaurs and their world, which vanished some 65 million years ago, is a matter of conjecture and educated guesses, so yesterday's theories are constantly being revised.
It's the speculative demand that causes most of the short-term fluctuations, since foreign exchange traders have to make guesses about the future, and those guesses are constantly being revised.
The hypothesis generally fits with current knowledge about maturation and disorders of immune system e.g. dysregulation of T helper type 1 (Th2), Th2 and regulatory T cell pathways, although the immunological models are constantly being revised and refined.
Janice said she hoped Mr. Gore's prescription drug benefit, which he proposes adding to the traditional Medicare program, would help her grandmother, who has diabetes and whose medication is constantly being revised by her doctors.
And the pricing of these privately held securities is constantly being revised by the board.
The trouble is that since technology is constantly being revised and things can become outdated quickly, finding the company that will have the strongest airport scanner for the longest amount of time, for example, is tricky.
Wasn't that enough?" The film's screenplay was constantly being revised and re-written.
This genome is constantly being revised and recompiled, and serves as the de facto maize database for BLAST.
