go as red as a beetroot
US /ɡoʊ æz rɛd æz ə ˈbiːtruːt/
UK /ɡoʊ æz rɛd æz ə ˈbiːtruːt/

1.
脸红得像个红萝卜, 羞得满脸通红
to have your face turn a deep red color, usually due to embarrassment or shame
:
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When she realized her mistake, she went as red as a beetroot.
当她意识到自己的错误时,她脸红得像个红萝卜。
•
He went as red as a beetroot when his secret was revealed.
当他的秘密被揭露时,他脸红得像个红萝卜。