eat one's words
收回自己的话
A:I think Dr. Smith will have to eat his words sooner or later.
A：我觉得史密斯医生迟早要收回他说的话。
B:But I feel confident of his ability to cure my son's disease.
B:但我确信他能治好我儿子的病。
A:How can you be so sure?
A:你怎么这么肯定?
B:Many people told me that he never talks big. I also can see from the way he spoke to us.
B：很多人告诉我他从来不说大话，从他跟我们说话的方式上我也能看出来。