请问大家,我是在美国5月1日走的EAPP,9号录指纹然后一直没有消息。上周通过web form询问了一下, 结果回复说“Your file is currently under review and requires additional verifications. As a result, the assessment period will be outside of our posted processing times.” 请问这个是background check吗?一般这种情况要等多久呢?