柯林斯词典pectin /ˈpɛktɪn/ (pectins) 1. N-MASS Pectin is a substance that is found in fruit. It is used when making jelly and jam to help it become firm. 果膠 返回 pectin剑桥词典a chemical found in some fruits that helps to make liquid firm when making jam or jelly 果膠 返回 pectin