about-face

v.

向后转；大改变；倒转；彻底改变

n.

突然改变（看法，立场等）；向后转（的动作）；

复数：about-faces

1. He made an abrupt about-face and left the room.
   他突然向后转，离开了房间。
2. His choice of that house was an about-face from his original intention.
   他选择这个房子的念头是改变后的决定

About-Face
About face
About-face
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Doing an about-face: Social motivation and cross-cultural currents.
Academy's About-Face on Forensic DNA
An About-Face Found in the Ancient Ocean
AN ABOUT-FACE ON GENE PATENTS
A Jamesian About-Face: Notes on "The Jolly Corner"
About-face on face recognition ability and holistic processing
An about-face for modern human origins.
The Arabidopsis clock: time for an about-face?
Italy performs GMO trial about-face