根据以下材料，回答题 Native American Pottery There are several American Indian groups in the Southwest that still make beautiful pottery. Some of this pottery may be sold at fairly high prices. But the makers consider their work as more than a commercial enterprise. By using methods handed downfor generations， the potters express their pride in their cultural inheritance （遗产） . Some of the most interesting pottery is made by the Pueblo Indians. There are 21 individual pueblos in Arizona and New Mexico. Several are famous for their craftsmanship.To make a pot，these potters use a clay base and add long thin coils of clay toit in a spiral pattern. When they have reached the size they want， they use an implement such as a rock or shell to smooth the surfaces of the pot. How a pot is decorated and fired depends on the traditions of the group making it. Traditional pottery produced by the Acoma， who have lived for centuries on a high mesa in NewMexico， is first painted with a clay slip. The resulting pots: which are prizedfor their delicacy and strength，may be left white. They may also be painted with black and white patterns or with a combination of black， orange， and brown. Very distinctive （忒别的，有特色的） black pottery comes from the Sail Ildefonso and Santa Clara pueblos. The black color is the result of carbon being released from the animal manure （粪肥） in which the pot is fired. Some artisans hand -rub this ware to a shiny gloss. Others cut patterns into it: resulting in a part shiny: part fiat surface. Potters at Sail lldefonso make many types of wares. Potters at Santa Clara are especially known for wedding jars-jars with two necks connected by a handle. Other groups such as the Hopi and the Cochiti also make pottery. Each group uses distinctive methods and produces distinctive .forms and designs. In the first paragraph the word 'commercial' means 查看材料