cats and dogs

例句：

1. 1.The cat and dog are playing together in the park.
   猫和狗在公园里一起玩耍。
2. 2.She has a cat and a dog as pets.
   她养了一只猫和一只狗作为宠物。
3. 3. The cat and dog were both very friendly.
   那只猫和狗都很友好。