n.马士提夫犬；獒犬（大型猛犬之一种）
The Mastiff barked at the Fisherman, because he was too hungry. 大驯犬却对着渔夫大声叫起来,因为它太饿了。
The Mastiff pup responded by flopping down on the grass and taking a nap. 这条幼獒犬的反应是往草地上重重一趴，干脆打起盹儿来。
乳房炎
