The phrase "a sustained level of" is correct and usable in written English.
It can be used to describe a consistent or ongoing degree of something, often in contexts related to performance, quality, or intensity.
Example: "The project requires a sustained level of effort from all team members to ensure its success."
Alternatives: "an ongoing degree of" or "a continuous amount of".
Such a sustained level of violence might appear shocking, but does not surprise those familiar with the risks of on-street prostitution.
In the last four or five months, we've seen a sustained level of interest when the discussion is framed very broadly and we have a speaker whom people recognize".
Also, our data shows an increasing number of surgical interventions and patients admitted to the ICU, reflecting a sustained level of patient severity and a risk factor for cross-transmission, HA-infections and antibiotic consumption.
But in fact, we have a sustained level of interaction with the President, and we're very grateful for this.
The shortcomings in the British Swimming squad were masked by Adlington's performances, which helped the organisation hit its medal targets, and keep a sustained level of funding for the London Games.
If brood production and the eclosion rate are too low to support a sustained level of forager losses then a colony will fail.
Using the handsome unit set designed by David Rockwell, this production has been directed by George C. Wolfe with a remarkably sustained level of anger and sense of accelerating doom.
Over time the CARI programme has been judged to progress steadily towards a greater, sustained level of support for most vulnerable children across all target countries.
There have been critical articles in the London-based previouslyiously, but never at such a sustained level by one of the biggest selling papers in the UK.
Loyalty needs to be built and when there is a steady and sustained level of care, people really respond.
At this point, we want to know more about how the man is capable of doing what he does at such a speed and sustained level of quality.
