"was mostly explained" is a correct and usable phrase in written English.
You can use it when someone has explained something in detail with some remaining information needing further explanation. For example: "The new company policy was mostly explained at the meeting, but a few details still need to be worked out."
The rest was mostly explained by career choices: for instance, more women worked at nonprofits, which pay less.
The extent of leaf area injured (leaf injury index) was mostly explained by the accumulated exposure of ozone (r2 = 0.89; p < 0.05).
Alien species richness was mostly explained by patch size and shape and built-up area proportion from 1956 and 2005 in a 50 m buffer around patches.
We detected a higher spatial aggregation of Montagu's harrier nests after wind farms were installed, when the distribution of nests was mostly explained by habitat and distance to the closest track.
Antipsychotics, which are primarily indicated for the treatment of psychotic disorders such as schizophrenia and schizoaffective disorder [13], have in terms of costs been among the fastest-growing therapeutic classes in Finland in the past decades, and the growth was mostly explained by the average cost per one day of treatment [14].
A reduction in body weight was, however, evident when the whole study population was analysed, but this was mostly explained by the change in the intervention group.
Southern Italy's backwardness is mostly explained by some local authorities squandering money on unnecessary projects.
Actually, Amtrak's problems are mostly explained by the map above, which was created last year by Michael Hicks, a Minnesota transportation blogger.On the map, every Amtrak station in America's 48 contiguous states is displayed as a blue circle.
Variance decomposition shows that stock market variations are mostly explained by self-innovation.
The variance decomposition shows that stock market variations are mostly explained by self-innovation.
These models are mostly explained as quasi-dynamics models (Boatwright 1981), which depend on field observations, laboratory experiments, and numerical modeling.
