英文關鍵字
activity
adult
athlete
back
backstroke
cap
caucasian
challenge
compete
competition
early
exercise
fit
fitness
front
goggles
handsome
health
healthy
indoors
lifestyle
male
man
morning
motion
open
outdoor
overhead
people
person
pool
power
practice
pursuit
reflection
splash
sport
stroke
sunrise
sunset
swim
swimmer
swimming
technique
view
water
yellow
young