about face

n.

act of pivoting 180 degrees, especially in a military formation

同义词：about-faceabout turn

a major change in attitude or principle or point of view

同义词：about-facevolte-facereversalpolicy change

1. The company did an about-face on their policy after the public backlash.
   在公众强烈反对后，公司对其政策做出了彻底改变。
2. He made an about-face and decided to support the new plan.
   他彻底改变了主意，决定支持新计划。
3. The decision was an unexpected about-face for the administration.
   这一决定是政府出人意料的彻底改变。