Many species are abundant enough to be utilised as a source of meat , skins , and other useful animal products 很多动物资源十分丰富,可以用来制作肉类、皮毛及其它有用的动物产品。
The earthworm is a useful animal . on the ground it is food for other animals . under the ground , it makes rich soil for fields and gardens 蚯蚓是一种有益的动物。在地面上它是其他动物的食物。在地下,它为田园和花园制造肥沃的土壤。