大きな犬が口にテニスボールをくわえて芝生の上を走っている
大きなテニスボールが、草地で走ってそれを口でキャッチするのを犬に教えるために使われている
A large dog is running on the grass with a tennis ball in its mouth
A large tennis ball is being used to teach a dog to run in the grass and catch it with its mouth
A large dog running on grass with a tennis ball in his mouth .
Passive;れる;動詞,接尾,*,*#Anaphora;それ;名詞,代名詞,一般,*