Эскиз объекта в научном блокноте

minimalistic hand-drawn sketch on a notebook page. The sketch features simple, clear outlines of {описание предмета}. Annotations are written in a simple handwritten script with arrows pointing to specific parts of the {предмет}. The background shows faint notebook lines and subtle imperfections like small tears or smudges. The overall style is organic and sketch-like, with minimal shading and a focus on clarity and simplicity. Include a few brief scientific notes and a date at the bottom of the page, resembling an authentic scientist's notebook entry --ar 9:16