You always get tetchy when you're hungry.

你一饿的时候脾气就不好。

《柯林斯英汉双解大词典》

Actually, your stomach makes noise whether you're hungry or full; you just hear it more clearly when you're hungry.

事实上，不管你是饿了还是饱了，你的胃都会发出声音；你只是在饿的时候更清楚地听到它。

youdao

When you get hungry, just pluck a pear off the tree and eat it.

肚子饿了你就从树上采摘一个梨吃吧。

《新英汉大辞典》

When you're really tired sleep is what you want to do like when you're really hungry you want to eat.

你累了，就会想睡觉,正如你饿了想吃东西一样。

耶鲁公开课 - 心理学导论课程节选

There may be a little uncertainty about whether the pizza place is still going to be open late at night when you get hungry.

就是当你饿的时候,不能确定批萨店是否还营业

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

And so it's thought and the research suggests this to be the case, that during this period of time here when the blood sugar is declining very rapidly and then when it goes down to below its initial level here -- you see that--that people are especially hungry and want to eat more.

这个例子被认为,同时研究也证明了,在这段时间,当血糖迅速降低时,以及当血糖降低到比它的初值还低时,大家能看到人会特别饿和想多吃东西

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Didn't make a big deal out of it, but just sort of said, listen to when you're hungry, and when you're full, stop.

WHITEHOUSE: The First Lady Takes On Childhood Obesity

It hasn't quite fooled people into eating dog food, but it suggests this: to prevent dog obesity, don't grocery shop when you're hungry.

NPR: U.S. Obesity Epidemic Hits Pets, Too

She says it's hard to make good decisions when you're hungry.

NPR: Eating Nutritiously A Struggle When Money Is Scarce