The phrase "a sustained level" is correct and usable in written English.
It can be used to describe a consistent or maintained degree of something over a period of time.
Example: "The project requires a sustained level of effort from all team members to ensure its success."
Alternatives: "an ongoing level" or "a continuous level".
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".
Led by the Australians - whose initiative allowed their bowlers more time to dismiss batsmen on good pitches while removing unpredictable fifth-day pitches, the great leveller, from the equation - scoring rates have reached a sustained level in excess of anything in the game's history.
The official statistics suggest that China's growth rate now places in the 6% range, down from a sustained level several points above that.
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.
44 Sitagliptin progressively reduced HbA1c levels during the first 12 weeks of treatment, and a sustained level was established thereafter.
YouTube this year downgraded its sponsorship of the festival, moving from a "leadership" level to a "sustaining" level.
"It still seems to me this is going to reach a different audience on a different level, and on a more sustained level.
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.
Loyalty needs to be built and when there is a steady and sustained level of care, people really respond.
