They are hungry.
他們餓了。

We're starving.
我們快餓死了。

He has an insatiable appetite.
他有一個貪得無厭的胃口。

I'm full.
我(吃)飽了。

She's on a diet.
她正在節食。

They're going to fast until sundown.
他們要一直禁食到太陽下山。

I'm so hungry I could eat a horse.
我餓到可以吃得下一匹馬。

Talking about food is making my mouth water.
談論食物讓我的嘴口水直流。

She didn't have much of an appetite and just nibbled on her carrots.
她沒什麼胃口，只是小口小口地啃著她的胡蘿蔔。

We wolfed down our meal.
我們狼吞虎嚥地吃完我們的餐點。

The cookies were gobbled up in less then 5 minutes.
不到五分鐘那些餅乾就被搜刮一空，吞下肚了。

Do you mind if I finish off the oatmeal?
你介意我把這些燕麥片吃光嗎？

I'm thirsty
我渴了。

He finished his drink in a single gulp.
他一口喝完了他的飲料。

The water quenched my thirst.
水解了我的渴。

We sipped the hot chocolate by the fire.
我們待在火堆旁小口小口地喝著熱巧克力。