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。

He threatened to stop helping us, but did a complete about-face.

他威胁要停止帮助我们，但是却来了个彻底的大转变。

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。

The about-face of Morris Chafetz, a doctor who served on the commission that recommended increasing the drinking-age to 21, has also raised eyebrows.

就连曾经在建议将饮酒年龄提高到21岁法定年龄委员会任职的医生Morris Chafetz，近来态度也发生了180度的转变，令人大跌眼镜。