剑桥词典[ 不可数或单数名词:没有复数形式的名词 ] leather made from the skin of pigs 猪皮(革) pigskin gloves /shoes 猪皮手套/鞋 [ 可数名词:有复数形式的名词 ] US informal the ball used to play American football 橄榄球 返回 pigskin