be on a diet

基本解释

You need not enter the gymnasium and be on a diet if you possess the instrument.
拥有中药减肥仪，从此减肥不用上健身房，不用节食。
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If you don't mind, could you tell me when you started to be on a diet?
假如你不介意的话，请告诉我你是什么时候开始节食的。
"If I knew I had to be on a diet seven days a week, I'd go nuts, " says Michelle Munoz, a Chicago realtor, "but five days I can handle.
“如果我知道一周七天都得节食，一定会疯掉的，”一位在芝加哥从事房地产中介的米雪儿‧慕诺斯如是说，她接着又说：“但节食五天的话，我就还可以忍受。”
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Unfortunately, the prime minister of Japan is politically too weak for Japan to be a leader in Asia: the Diet can remove him almost on a whim.
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And if the phone is going to literally be nothing more than a portal to the web, then it's going to be a tough sell for those that have to subsist on a very strict data diet.
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Fundamentally, unless you're going to be shopping for groceries every day, it'd be preferable to work out your diet on a weekly basis, but there's no evident way to offer this up in Nutrino's present form.
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