The United States has more than 4,500 troops in Iraq, largely in an advisory capacity.

美国已经派遣4500多士兵到伊拉克，主要是履行咨询任务。

Rollins will be working in an advisory capacity on this project.

【capacity】罗林斯将以顾问的身份参与这个项目。

Around 5,000 U.S. troops remain in Iraq, most of them in an advisory capacity, after the wars against Islamic State militants in 2014 and 2017.

在2014年和2017年打击伊拉克国激进分子的战争结束后，大约有5000名美军仍然留在伊拉克，其中大部分以顾问身份驻守。