The phrase "a middle level of" is correct and usable in written English.
It can be used when describing a moderate or intermediate degree of something, such as quality, intensity, or complexity.
Example: "The project requires a middle level of expertise to ensure its success."
Alternatives: "an intermediate level of" or "a moderate level of".
We also find suggestive evidence, consistent with herd immunity theory, that the protective sunlight effect is strongest with a middle level of population density.
The 75 homes in three of the groups received maintenance and repairs to reduce lead levels: 25 had minimal repairs, including scraping lead-based paint; 25 had a middle level of repairs; and 25 had extensive work, including replacement of windows and covering floors.
"As the sensory intensity (say, of sweetness) increases, consumers first say that they like the product more, but eventually, with a middle level of sweetness, consumers like the product the most (this is their optimum, or 'bliss,' point)." I first met Moskowitz on a crisp day in the spring of 2010 at the Harvard Club in Midtown Manhattan.
Built with about 2,000,000 cubic feet (56,600 cubic metres) of gray volcanic stone, Borobudur encloses a small hill and is shaped like a stepped pyramid with three major levels a square base, a middle level of five square terraces, and an upper level of three circular terraces totaling, in effect, nine lesser sections (the number nine is mystic in Buddhism).
In addition, Shanxi province, with a middle level of socioeconomic development, increased by 0.26%.
We think having a middle level of fear of failure inhibits loss of control and effects that lead to one of the named ten forms of failure (see paragraph "counter indication").
Every critical variable showed maximum melanin production at a constant middle level of the other variables.
Tunisia is a North African country of about ten million inhabitants [ 21], that has undergone a steady and rapid economic development and reached an upper middle level of development (ranked 89th out of 177 countries on the Human Development Index composite scale in 2005) [ 22], but which 7 administrative regions are geographically and socio-economically contrasted.
The whole thing has been, I'd say, kind of a middle level train wreck".
Among mothers with a low or middle level of education, this association vanished when socioeconomic circumstances were controlled.
Nevertheless, for children whose mother has a low or middle level of education, no observable impact of having been unplanned can be shown.
