a type of eating plan in which someone aims to lose body weight by eating a lot of foods that are high in fat, but few carbohydrates (= foods such as bread and potatoes), with the result that the body is forced to burn fats rather than carbohydrates

The keto diet is a very low-carb and high-fat diet. 生酮饮食是一种碳水极低脂肪很高的饮食。

I have now been on a keto diet for the last 3-4 weeks. 在过去的3、4周里，我一直在吃生酮饮食。