expiration file的意思|示意

The expiration time applies to any policies specified in the file.

应用于任何策略的过期时间都是在该文件中指定的。

Check the boxes for Set expiration time and Stash password to a file.

检查文本框Set expiration time和Stash password to a file。

But here's what makes Drop.io unique: When you upload a file, the service asks you to put an expiration date on it.

但Drop . io的特别之处在于：当你上传了一个文件，服务会让你为文件设定一个截止日期。