feed off something phrasal verbphr v a) HBAEATif an animal feeds off something, it gets food from it 〔动物〕从…取食 birds that feed off the seeds from trees 以树籽为食的鸟
b) to use something to increase, become stronger, or succeed – sometimes used to show disapproval 因…而壮大[成功]〔有时含贬义〕 fad diets that feed off our desire to be thin 因我们的瘦身愿望而风靡一时的节食法
→ feed off something at feed1(PHRASAL VERB)