You cannot eat a bun in one bite.

你不能一口吃下一个面包。

youdao

You cannot eat your cake and have it.

（谚语）你不能两者兼得。

youdao

You cannot eat your cake and have it too.

你不能吃掉蛋糕而又保有它。

youdao

Those of you who are familiar with what's going on in New York City may know that if you're in a New City restaurant now you cannot eat trans fats, because trans fats have been banned from the restaurants.

你们中间对纽约很了解的人,可能知道在新城饭店,你吃不到含有反式脂肪的食物,因为餐厅里面全面禁止该种食物

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

As for why you cannot eat GM wheat, it would almost certainly have nothing to do with the use of biotechnology.

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Oil may promise wealth, but you cannot eat or drink it.

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You cannot talk on the phone while you eat.

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