make a volte-face来个一百八十度的大转变
to do a volte-face翻译;来个一百八十度的大转变
N-COUNT（可数名词） If you say that someone's behaviour is a volte-face, you mean that they have changed their opinion or decision completely, so that it is the opposite of what it was before. (观点或决定的)彻底转变 [英国英语][正式][usu sing]