交作业！ 谢方兄！

一位直接了解该计划的官员告诉CNN，拜登政府实际上解除了对美国军事承包商部署到乌克兰的禁令，以帮助该国军队维护和修理美国提供的武器系统，特别是F-16战斗机和爱国者防空系统。

An officer in direct contact with the plan told CNN that Biden Administration had in fact lifted the ban on American military contractors to Ukrain, in an attempt to help maintain and repair the America-supplied weapon systems, in particular F-16 fighter jets and Patriotic air defense systems.