tat

音标发音

Tat: Must there be one ‘her’?
答：一定得有个“她”吗？
Suddenly there came a rat-a-tat on the door.
突然传来了一阵梆梆的敲门声。
TAT, another start-up, already experiments with something called “Augmented ID”, which uses facial recognition to display information about a person shown on a smartphone’s screen.
另一家新兴公司TAT已经开始尝试一种名为“增加身份”的软件，能够通过人脸识别功能提供智能机屏幕上人物的身份和信息。

For the campaign tit-for-tat, at the purely political level, I refer you to the campaigns.
WHITEHOUSE: Press Briefing by Press Secretary Jay Carney,
The United States and China have exchanged accusations of dumping for years and imposed tit-for-tat duties.
FORBES: Why Antidumping Duties On Chinese Furniture Don't Save U.S. Jobs
And it would do so without embroiling us in a bitter tit-for-tat trade war with China.
FORBES: Forget the WTO: The Rare Earths Solution Is Right Here at Home