英语语法分析

It's a counterterrorism contractor.

这是一个反恐的承包商。

Summary: Yemen is now at the forefront of U.S. counterterrorism efforts.

概要：也门现在正处在美国反恐的最前线。

Neither is correct, says John Brennan, a top White House counterterrorism adviser.

白宫高级反恐顾问约翰·布雷南则认为以上两种说法都不对。