牛头犬

例句：

1. 1. The bulldog is a loyal and protective breed of dog.
   斗牛犬是一种忠诚且保护性强的狗品种。
2. 2. Bulldogs are known for their thick, wiry coats.
   斗牛犬以其浓密、坚韧的毛发而闻名。
3. 3. Bulldogs often have distinctive black spots on their noses.
   斗牛犬通常鼻子上有独特的黑色斑点。