不饱和脂肪酸

bù bǎo hé zhī fáng suān

unsaturated fatty acid

不

bù

no; not so

饱

bǎo

to eat till full

和

hé

(literary) harmonious (variant of 和[he2])

脂

zhī

fat

肪

fáng

animal fat

酸

suān

sour