英文關鍵字
trainer
standing
walking
pensive
reasoning
competition
elderly
adult
thinking
training
sports
caucasian
two
men
grayhaired
beard
canoeing
man
kayak
canoe
paddle
pool
swimming
rowing
technique
exercise
repetition
skill
professional
international
water
river
pond
outdoor
recreation
activity
lifestyle
game
fitness
practice
ready
male
relaxed
cold