noun, noun or participle which takes 'suru', transitive verb
supplementary explanation; additional commentary
Used for explanatory notes, appendices, or commentary that supplements a main text or argument. Often found in academic, technical, or editorial contexts.
この章の最後に補説を加えた。
I added a supplementary explanation at the end of this chapter.
補説として、もう少し詳しい
As supplementary information, I will include some more detailed data.