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
大きくて灰色の犬が口にくわえたボールを運んで草地を走り抜けている
A large tennis ball is being used to teach a dog to run in the grass and catch it with its mouth
A dog, which is large and gray, is carrying a ball in its mouth and running across the grass
A large dog is running on the grass with a rope in its mouth .
Passive;れる;動詞,接尾,*,*#Anaphora;それ;名詞,代名詞,一般,*