tat

音标发音

Tat: Must there be one ‘her’?
答：一定得有個“她”嗎？
Suddenly there came a rat-a-tat on the door.
突然傳來了一陣梆梆的敲門聲。
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.
另一家新興公司TAT已經開始嘗試一種名爲“增加身份”的軟件，能夠通過人臉識別功能提供智能機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