英文關鍵字
runner
guy
male
young
athlete
fitness
sports
person
sport
running
staircase
outdoor
horizontal
jogging
step
endurance
exercising
20yearold
stairs
concrete
descent
down
urban
city
shorts
cardio
intense
load
legs
foot
sneakers
black
sportswear
one
skillfully
alone
movement
development
sportsperson
outdoors
workout
health
hobbies