0 one of the many parts of a tree that grows out from its trunk (= main, vertical part) -- ветка
1 one of several shops, offices, etc that are part of a company or organization -- филиал, отделение
2 a part of a subject -- отрасль
Neurology is a branch of medicine.
3 If a road, path, etc branches, it separates into two or more roads, paths, etc. -- разветвляться
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Мы можем выполнить ее шаг за шагом, какой бы длинной ни была дорога, и она не может быть завершена, какой бы короткой ни была дорога, если вы даже не обозначите свой след.