sci论文投稿后多数是会返修的，而有的作者比较忙没有在规定时间内完成修改工作，这时要申请延长返修时间，询问有没有参考模板?一般是有一次延期申请的机会，作者申请理由一定要充分，如下是三个可以参考的模板：

　　模板一、

　　感谢您给我们一个机会进行重大修改，将我们的手稿提高到适合在贵刊上发表的水平。然而，我们需要一个新的延长期限，以便进一步修订。您能把截止日期延长到XXX吗?

　　邮件主题：Asking for extending the deadline [ID-XXXXX]

　　Dear XXX,

　　Thanks for your email informing us that our manuscript entitled "XXX" (Manuscript ID: XXX ) is due for revision. We appreciate that you gave us a chance of major revision to improve our manuscript to meet the publication requirements of your journal. However, We we would like to ask you to extend the deadline for further revision. Could you please extend the due day to XXX? Thanks for your kindness.

　　Best regards,

　　XXX

　　模板二、

　　根据审稿人的建议和意见，我们需要为我们的手稿进行更多的实验。我们恐怕无法在截止日期(XXX天内)之前重新提交修订。因此，如果您能将截止日期(最好是XXXX)延长，我们将不胜感激，以便我们能更恰当地修改手稿。

　　邮件主题：Asking for extending the deadline [ID-XXXXX]

　　Dear XXX ,

　　We are writing to you regarding our submitted article entitled“XXX”(Manuscript IDID-XXXXX), which is currently under revision. According to the reviewers’ suggestions and comments, more experiments should be conducted for our manuscript.We are afraid that we can not resubmit the revised peper before the deadline (within XXX days). Therefore, we will be most grateful if you could extend the deadline, preferably, XXXX, so that we can revise the manuscript more appropriately.Thank you in advance for your consideration and kind assistance. We are looking forward to your early reply.

　　Kind regards,

　　XXXX

　　模板三、

　　非常感谢您对这份手稿的仔细考虑。为了按照审稿人的要求全面修改稿件，我们需要更多的时间来完成这次修改。因此，我们诚挚地要求额外的XXX天时间来修改手稿。

　　邮件主题：Asking for extending the deadline [ID-XXXXX]

　　Dear XXX,

　　Thank you very much for your kind consideration of this manuscript . In order to fully revise the manuscript as required by referees, we need more time to finish this revision. So, we cordially ask for additional XXX days time for revising the manuscript. Please let us know if this is possible.

　　Kind regards,

　　XXXX

　　上述是大家可以参考的申请延期模板，在这里也提醒各位作者不要到截止期限才申请延期，自己没有时间修改，一定要提前申请，而且在延迟修回时间内要完成返修，二次申请延迟修回，基本上是会直接拒绝的，作者这点是要把控好的，更多的邮件回复问题，邮件申请模板等都可以咨询专业人员，给您提供更详细的指导。