dietnoun

to eat a healthy, balanced diet  健康平衡的饮食

I loved the Japanese diet of rice,vegetables and fish. 我喜欢日本料理中的米饭蔬菜和鱼类的饮食搭配

He followed a strict low-fat diet. 他严格保持低脂饮食

on a diet   I decided to go on adiet (= to lose weight) before my holiday.

I'm on diet. So I'll just have some salad.

She's always dieting but she never seems to lose any weigh