によって Emma McNutt 2年前.
213
COMPLEX SYSTEM
In the realm of BMX biking, the interplay between physical and social sub-systems is paramount. The physical sub-system involves components like wheels, seats, and pedals, all contributing to the bike'
によって Emma McNutt 2年前.
213
もっと見る
betrayel
doubt
happiness
friends
courage
initiative
injury
losses
speed
trophies
seat
pedals
