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eat away at sb
长期困扰（某人）；烦扰（某人）
to make someone feel more and more unhappy or worried
People talk about my glory days but the bad moments still eat away at me.
人们都在议论我的光辉岁月，但那些困境一直以来都困扰着我。

[美]eat crow
[英]eat humble pie
认错，道歉
It looks like I was wrong, and I'm going to have to eat crow.
看起来是我错了，我必须得承认错误了。

eat somebody alive
严厉地批评
to criticize someone very angrily
If I eat my words, I am going to be eaten alive.
如果我承认错了，我会被喷死。

For here or to go?
带走还是在这吃呢？

I'd like a cheeseburger to go.
我想点个芝士汉堡，带走。