美 [əˌbaʊt ˈfeɪs]
n. （思想、态度、行为等）彻底改变；向后转（同 about-turn）
v. 向后转（同 about-turn）
about-face //
可数名词 An about-face is a complete change of attitude or opinion. 彻底改变
Few observers believe the president will do an about-face and start spending more.
没有几个观察家认为总统将做出彻底改变并开始增加支出。
act of pivoting 180 degrees, especially in a military formation
同义词： about turn
a major change in attitude or principle or point of view
an about-face on foreign policy
同义词： volte-face / reversal / policy change
turn, usually 180 degrees
change one's mind and assume the opposite viewpoint
... bringhome：使深刻认识到，第一流的 about-face：向后转 abouttime：该。。。。。。时间了，正确，炸毁，sbrainout：绞尽脑汁 ...
... 牟取最大利益 Cream off 限制和交易 cap-and-trade 180度大转弯 about-face ...
...照明的、可产生持续明亮光线的可再次使用的电灯 A reversal, as in policy; an about-face.向后转转向反面，如在政策上；大转变 ..
... About-face：（态度，观点等）彻底改变。 Accordion：褶的，折叠的；手风琴 Ace：极小量，佼佼者 ...
向后转；转回原来方向；（立场、观点等）彻底改变
向后转；改变主张
Few observers believe the president will do an about-face and start spending more.
没有几个观察家认为总统将做出彻底改变并开始增加支出。
This past December, Facebook did an about-face on privacy.
刚过去的十二月，Facebook的隐私政策上演大变脸。
Joost started by offering video through its own software application, but lost out to Hulu and did an about-face.
Joost曾经通过自己的软件提供看影像，但是输给了Hulu，最后不得不做出改变。
An online tutor is about half the cost of traditional face-to-face coaching.
VOA : special.2011.04.21
I wrote my first book--I already talked about that, Pioneering Portfolio Management--that deals with the challenges that face institutional investors.
我写的第一本书,我已经提到过了,《机构投资的创新之路》,讨论了机构投资者所面临的挑战
金融市场课程节选 : 耶鲁公开课
We learned about cognitive neuroscience using the study of face recognition as an important case study-- human differences, behavioral genetics, nature and nurture, sex and food.
我们学习了认知神经学,引用面部识别的研究,作为重要的例子分析-,还学了人体差异，行为遗传学，先天与后天，性与食物。
心理学导论课程节选 : 耶鲁公开课
Some of those activists participated in the Human Rights Accords in Dayton Ohio, a two-day conference to help raise awareness about the problems victims face.
VOA : standard.2009.11.13
Or surely I'd about-face and on the double, But it just doesn't work anymore.
The provisions, part of the 650-page corporate tax bill enacted in October, represent an about-face by Congress.
They could very well soon stretch nationwide, if Illinois completes its about-face on concealed carry.
FORBES: A Gun-Control Battle That Could Actually Damage The Industry Is Escaping Public Attention