可以用 "Dogs are intelpgent" 来表示狗很聪明。
这句话的来源可能是人们对狗智能的共识。狗是一种非常聪明的动物，它们能够学习和理解许多指令和技能。
例句：
"Dogs are intelpgent animals that can be trained to do many tasks." (狗是聪明的动物，可以被训练做很多任务。)
"My dog is so smart, she knows how to open the fridge and get her own food." (我的狗非常聪明，她知道怎么打开冰箱并自己拿食物。)
"Dogs are so smart that they can even be trained to be therapy animals for people with disabipties." (狗非常聪明，甚至可以被训练成为残疾人的治疗动物。)