文本
A: what do you think about all the different diets people go on?

W: I don't think dieting is good for you. It's much better to eat a balanced diet and to never get overweight to begin with!

A: but what do you think about people who are obese? What should they do to lose weight?

W: they need to eat healthy foods, but they also have to increase the amount of exercise they do every day. They don't have to cut out fattening foods altogether, though.

A: so you think it's ok for people who are dieting to eat chocolate?

W: sure, they can eat some chocolate. As long as they are exercising and eating mostly healothy foods, there's nothing wrong with having a small desert.

A: how about drinking soda?

W: many people gain weight by drinking far too much soda. Soda should be a treat; there's simply no nutritional value in it whatsoever. If you want to lose weight and you can't stop drinking soda, try some diet coke.

A: that's good advice. Have you ever tried taking vitamins?

W: my mother used to make me take viramins every day, but I don't take them anymore. Vitamins are good as a supplement, but they don't do much good if you don't have a well-balanced diet to start.

A: how do you know so much about food and dieting?

W: you might not believe this, but I used to be twice the size than I am now!
参考翻译
对于人们进行各种各样的节食你怎么看？
我觉得节食对你不好。饮食最好要均衡,而且从小就得注意不要肥胖。
但是那些已经肥胖的人该怎么办呢？他们应该怎么减肥。
他们要吃健康食品，不过还得同时增加每天的运动量。而且，不能一下子就把所有会长胖的食物都停掉不吃。
那么你觉得正在节食的人吃些巧克力也是可以的？
当然，他们可以吃些巧克力。只要他们坚持锻炼，而且摄入的主要都是健康诗品，那么吃点儿甜食也没有关系。
那喝汽水呢？
很多人体重增加都是因为喝了太多的汽水。汽水的问题应该认真对待，无论如何，那里面一点儿营养价值都没有。如果末既想减肥又不想戒掉汽水，那么我建议你试试喝健怡可乐。
这是个好主意。你有没有试过吃维生素片？
我妈妈以前曾经让我每天都吃点维生素片，但是我现在不吃了。维生素作为一种营养补充剂确实很好，但是如果你饮食摄入不均衡，那么它也不会有太大作用。
你怎么知道这么多关于饮食的减肥的知识。
你也许不相信，我以前比现在胖一倍。
核心词汇
Vitamin 维生素
This type of bread has added vitamins.
这类面包中添加了维生素.

Supplement 添加物,补充物
vitamin / dietary supplements
补充的维生素/补充饮食

Balanced diet 平衡膳食

Diet coke 健怡可乐