经典口语表达：

I wish I was as slim as you.

我希望能和你一样瘦。

You have a slender figure.

你身体苗条。

He's big and beefy.

他身材魁梧，肌肉发达。

还可以说：

He's heavy-built and muscular.

She is plump without being fat.

她长得丰腴但不肥胖。

You're overweight.

你太胖了。

He's putting on weight.

他胖起来了。

还可以说：

He's gaining weight.

No chocolate, please. I'm on a diet.

请不要放巧克力。我在节食。

She's dieting to lose weight.

她以节食减肥。

I need to go on a diet.

我需要节食减肥。

I don't want any cake. I'm slimming.

我什么蛋糕都不。我正在减肥。

Conversation:

A: I've been putting on a few pounds these days. Have you got any suggestions on how to lose weight?

B: How much do you weigh now?

A: About 150 Pounds. Can you believe it?

B: But that weight looks good on you. I certainly don't think you need to lose weight.

A: But I wish I had a slim figure like you. How often do you exercise?

B: I go to the gym three times a week.

A: What kind of exercise do you like to do?

B: I like to pump iron, swim and go hiking.

A: Cool. I'm just not interested in doing exercise. Are there any other ways I can lose weight without exercising?

B: Then I'm afraid that you have to go on a diet. Eat less or no rich food and sweets.

A: I will.

B: Even if you're going on a diet, you still need to make sure that you have a good breakfast.

Translation:

我这几天长胖了，你有什么减肥的好的建议吗？

你现在多重？

大概150磅。你能相信吗？

但是你看上去还好啊。我真的觉得你不需要减肥。

但是我想拥有像你一样苗条的身材。你多久锻炼一次？

我每周锻炼三次。

你喜欢什么样的运动？

我喜欢撸铁，游泳，和徒步旅行。

真棒。我就是对锻炼没有兴趣。有没有其他不需要锻炼就能减肥的方法？

那我恐怕你要节食啦。少吃或不吃油腻的食物和甜食。

好的。

即使你节食，你仍然需要确保早餐吃得好。