extension是啥意思?

问题描述:

extension是啥意思?
对话如下
Teacher:Linda,have you finished your assignment yet?
Linda:I'm nearly there I should be able to give it to you on Monday.
Teacher:That's good.I can't let you have another extension.
这里extension是啥意思,整句话是啥意思?

延期
老师:琳达,你已经完成作业了吗?
琳达:差不多啦!星期一我应该能把它交给您.
老师:那好.我不能再一次给你延期啦.