two-decker cage

例句：

1. 1.The two-decker cage is a popular choice for keeping small pets.
   双层笼是养小型宠物的热门选择。
2. 2.The two-decker cage is designed to provide ample space for the animals inside.
   双层笼设计用来为里面的动物提供充足的空间。
3. 3. The two-decker cage has been shown to be effective in reducing stress levels in captive animals.
   双层笼已被证明在减少圈养动物的压力水平方面是有效的。