polyunsaturated
adjective chemistry, food & drink specialized uk/ˌpɒl.i.ʌnˈsætʃ.ər.eɪ.tɪd/ us/ˌpɑː.li.ʌnˈsætʃ.ə.reɪt/
（脂肪或油脂）多重不饱和的
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.
polyunsaturated margarine/vegetable oil 多重不饱和黄油／植物油
Compare: monounsaturated