be up to date

基本解释

As long as you've bundled your AMI recently, your database system will be up to date.
如果您最近已经打包了您的 AMI，您的数据库系统将是最新的。
Data: With the cache in messaging middleware, response messages may not be up to date.
数据：由于消息传递中间件中使用了缓存，因此响应消息可能会不是最新的。
However, because it's not guaranteed that all your users will be up to date with their Linux versions, target the oldest possible version of Linux with which your application can work.
然而，由于无法保证所有的用户使用的都是最新的 Linux 版本，因此在开发应用程序时，我们的一个目标是让程序能够在可能最早的 Linux 版本上运行。

I'll be sending you a global e-mail bringing you up to date with some other things later on this afternoon.
我会发给你们一封电子邮件,你们再了解些其他事项,好跟上进度,今天下午晚些时候就发
耶鲁公开课 - 聆听音乐课程节选
The second person I have set up now to come-- although the date on the syllabus online is going to be changed--is Andrew Redleaf, who is also a Yale graduate and who set up a hedge fund called Whitebox Advisors.
我邀请的第二位客座嘉宾,也许网上教学大纲的日期,会有所变动...是安德鲁·雷德利夫,他也是一位耶鲁的毕业生,他创设了Whitebox Advisors对冲基金
耶鲁公开课 - 金融市场课程节选

Also, you must be up to date on technology for sharing information, communicating decisions, and collaborating on projects quickly and cost-effectively.
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Your mobile apps must be up to date.
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