大犬

例句：

1. 1. The big dog is always ready to protect its owner.
   这只大狗总是准备好保护它的主人。
2. 2. The big dog was very friendly and playful.
   这只大狗非常友好且活泼。
3. 3. The big dog was a loyal companion to the family.
   这只大狗是家庭忠实的伴侣。