"added an explanation" is a correct and usable phrase in written English.
You can use it when you are referencing an explanation that has been added to something, such as an opinion, an article, or a document. For example, "The author added an explanation to the end of the essay clarifying her point of view."
The Skills For Care website has recently added an explanation of how graduates can access the assessed year while working in the voluntary sector.
He added an explanation of the decision not to name the officer who shot Kodi Gaines, citing "an unprecedented number of threats" against officers.
— Identity Guard, offered by Intersections Inc., has added an explanation to make clear that the credit score it provides as part of its service is for educational purposes, and isn't the score that lenders actually use.
He added an explanation for all the whispering: fierce partisan polarization, he said, seems to have filtered out from the highest reaches of government even to places like this, Charlie Parker's Diner, where pancakes can be as big as pizzas.
This further added an explanation to increased emission intensity of the hydrothermally prepared samples with increasing crystallinity.
Regarding the erroneous answer selected by the learner, they added an explanation that clarified the correct conditions to guide the learner to this erroneous answer.
Instead, he papered it over, adding an explanation to the notes suggesting that the vote did not represent his opinion, but was rather a tactical ploy designed to "alarm" other members of the convention into doing just the opposite, limiting the tenure of the president rather than extending it to life.
For instance, the guidance suggests adding an explanation of the geometrical features identified and used to classify suspicious shapes.
This finding adds an explanation to other research that found that portfolio entrepreneurship facilitates the attraction of resources (Lechner and Leyronas 2009).
What Dedekind has introduced, along such lines, is the natural numbers conceived of as finite "ordinal" numbers (or counting numbers: the first, the second, etc).. Later he adds an explanation of how the usual employment of the natural numbers as finite "cardinal" numbers (answering to the question: how many?) can be recovered.
At a minimum, you need to add an explanation of the proposed model in Figure 4, and relate the new findings and model to other models of Sir2-mediated gene regulation or lifespan effects.
