准备以每公里2分50秒或更快的速度跑完42.2公里 || 亲爱的朋友们，让我们一起努力吧 :)

Поддержать стримера: https://www.donationalerts.com/r/vuj4ik Благодарю! :) Google Scholar: https://scholar.google.com/citations?view_op=list_works&hl=en&user=zkbd604AAAAJ eLIBRARY: https://www.elibrary.ru/author_items.asp?authorid=1248113