por Emma McNutt hace 2 años
199
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'
por Emma McNutt hace 2 años
199
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betrayel
doubt
happiness
friends
courage
initiative
injury
losses
speed
trophies
seat
pedals
