" The tit has to be reasonably in line with the tat, " says Jean-Francois Lambert, a commodities consultant.

“针锋需合理相对，”大宗商品咨询师让-弗朗索瓦·兰伯特如是说。

In around eight months, the WTO is likely to authorise the EU to put tariffs on American imports, completing the tit for tat.

在约八个月内，WTO可能授权欧盟对美国进口征税，以牙还牙。

A senior Czech official said the tit for tat expulsion would wipe out virtually the entire political section of their Moscow embassy.

一名捷克高级官员表示，这次以牙还牙的驱逐行为，几乎清除了捷克驻莫斯科大使馆的整个政治部门。