英汉词典

1. 日常饮食;日常食物
    Your diet is the type and range of food that you regularly eat.

    e.g. It's never too late to improve your diet.
           什么时候改善饮食都为时不晚。
    e.g. ...a healthy diet rich in fruit and vegetables...
           富含水果和蔬菜的健康饮食

2. (医生指定的)特别饮食，规定饮食
    If a doctor puts someone on a diet, he or she makes them eat a special type or range of foods in order to improve their health.

    e.g. He was put on a diet of milky food.
           他按照医嘱要食用乳制品。
    e.g. ...a special diet for children with high cholesterol.
           专为胆固醇高的孩子准备的特别饮食

3. （为减轻体重的）限制饮食，节食
    If you are on a diet, you eat special kinds of food or you eat less food than usual because you are trying to lose weight.

    e.g. Have you been on a diet? You've lost a lot of weight...
           你最近在节食吗？你瘦了好多。
    e.g. Diet and exercise will alter your shape...
           节食和锻炼会改变你的体形。

4. (为减轻体重而)限制饮食，节食
    If you are dieting, you eat special kinds of food or you eat less food than usual because you are trying to lose weight.

    e.g. I've been dieting ever since the birth of my fourth child...
           我生完第四个孩子后就一直在节食。
    e.g. Most of us have dieted at some time in our lives.
           我们大多数人都曾在人生的某个时期为减肥而节食过。