英文關鍵字
action
activity
athlete
backhand
ball
blow
body
caucasian
challenge
competition
concentration
court
exercise
field
forehand
game
grass
guy
gym
happy
healthy
hit
human
leisure
male
man
match
move
net
people
play
player
playful
playing
practice
professional
racquet
recreation
slowmotion
smile
sport
sportive
sportsman
sportwear
stadium
tennis
train
training