用英语来说明：猪是一种很聪明的动物

Smart, Clean, and Lean

Do you sweat like a pig? Chances are you don't, especially if you can wring out your shirt at the end of a hot day. Contrary to popular belief, pigs are unable to sweat; instead, they wallow in mud to cool down. Their mucky appearance gives pigs an undeserved reputation for slovenliness. In fact, pigs are some of the cleanest animals around, refusing to excrete anywhere near their living or eating areas when given a choice.

Piglet, "host" of THE JOY OF PIGS.

Pigs are misunderstood in many ways. Many people think of them as portly and stupid, but the NATURE program THE JOY OF PIGS shows us how intelligent pigs really are. (They are naturally lean, too, unless they are overfed by humans.) Pigs are smarter than any other domestic animal. Their ability to solve problems, like the pig I.Q. test on THE JOY OF PIGS, is well-documented, and they are considered by animal experts to be more trainable than dogs or cats