事实上，几个月来，美国和阿富汗政府进行了痛苦的谈判以确定可以让美国几乎无限制地在阿富汗保留军事基地的安全协议。
Indeed, for several months, the US has been involved in painstaking negotiations with the Afghan government to conclude a bilateral security agreement that would enable the US to maintain bases in Afghanistan virtually indefinitely.