Ancient Chinese people were inspired by the water boiling food theory. They made China the earliest country to cook with steam.

只有中国人的祖先从水煮食物的原理中获得灵感，并使中国成为最早用蒸汽烹饪的国家。

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One theory is that people with mental distress eat more junk food.

有个理论说，精神苦闷的人会吃更多的垃圾食品。

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One theory is that sniffing the food tricks the brain into thinking you're actually eating it.

有一种理论认为闻食物会欺骗大脑，让它误认为你实际在吃东西。

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Lots of junk food, the theory went, can mess up your brain and make you depressed.

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There was no food in the apartment, and one theory is that Firestone starved, though no autopsy was conducted, by preference of her Orthodox Jewish family.

NEWYORKER: Death of a Revolutionary

Add it up and a theory emerges: Overeaters consume more food than is good for them to get the kick that dopamine delivers--the same reason that cokeheads snort cocaine.

FORBES: Food on the Brain