最近投了一篇PNAS，送审后20天就返回了，但是没有收到邮件，请问要等多久？谢谢！
Pending Final Recommendation        2015-10-27
Under Review        2015-10-08
Under Editor Review        2015-10-08
Under Editorial Board Review        2015-10-06
Quality Control Review Completed        2015-10-06
Quality Control Review Started        2015-10-05
Author Approved Submission        2015-10-05
Waiting for Author Approval of Converted Files        2015-10-05
Waiting for File Conversion        2015-10-05 返回小木虫查看更多