1.Do you want to grab a bite to eat before we see the movie?
看电影之前你想随便吃点什么吗?
a bite:
to get something to eat; to get food that can be eaten quickly. (*Typically: get ~; grab ~; have~.)
2.She exists on bread and water.
她靠面包和水度日。
3.I asked for a doggy bag because I planned to eat the leftovers tomorrow.
我要了一个打包盒，因为打算把剩下的菜留到明天吃。
doggy bag:
A bag (or other container) used to take home uneaten food from a restaurant meal.
