劍橋詞典Polyunsaturated fat or oil has a chemical structure that does not easily change into cholesterol (= a substance containing a lot of fat that can cause heart disease ) because it contains several double bonds . （脂肪或油脂）多重不飽和的 polyunsaturated margarine /vegetable oil 多重不飽和黃油／植物油 比較monounsaturated 返回 polyunsaturated