猪是一种常见的哺乳动物，属于猪科。在英语中，猪被称为pig。

Pig is a common mammal that belongs to the family Suidae. It is often raised for its meat, which is a popular food source around the world. Pigs are also known for their intelligence and sociability, and are sometimes kept as pets.

In terms of appearance, pigs have a rounded body with short legs and a snout. They come in a variety of colors, including pink, brown, black, and spotted. Pigs are known for their distinctive grunting sound, which is often heard in farms and other rural areas.

In addition to being raised for their meat, pigs are also used in scientific research and as a source of materials such as leather and gelatin. However, there has been growing concern over the treatment of pigs in farming and the ethical considerations surrounding their use.

Overall, pigs are an important and fascinating animal that play a significant role in human society.