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Flinch
flinch /flɪntʃ/
v. 退缩，畏惧
It means that someone is unwilling to do something, or to think about it, or avoids doing it.
它指的是某人不愿意做某事或思考某事，或是逃避某事。
Don't flinch. It's your last chance.
别退缩，这是你最后的机会了。
Tom met my gaze without flinching.
Tom毫不畏惧地和我对视。