eat up 吃光;

eat out 上馆子吃;

eat in 在家吃饭;

eat like a bird 吃得很少;

grab a bite 随便吃几口;

I'm full 我吃饱了;

be on a diet 节食;

overeat 吃得太多;

swallow 吞咽;

chew 咀嚼;

staple food 主食