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.
如果您最近已經打包了您的 AMI，您的數據庫系統將是最新的。
Data: With the cache in messaging middleware, response messages may not be up to date.
數據：由於消息傳遞中間件中使用了緩存，因此響應消息可能會不是最新的。
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，由於無法保証所有的用戶使用的都是最新的 Linux 版本，因此在開發應用程序時，我們的一個目標是讓程序能夠在可能最早的 Linux 版本上運行。

I'll be sending you a global e-mail bringing you up to date with some other things later on this afternoon.
我會發給你們一封電子郵件,你們再了解些其他事項,好跟上進度,今天下午晚些時候就發
耶魯公開課 - 聆聽音樂課程節選
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.
我邀請的第二位客座嘉賓,也許網上教學大綱的日期,會有所變動...是安德魯·雷德利夫,他也是一位耶魯的畢業生,他創設了Whitebox Advisors對沖基金
耶魯公開課 - 金融市場課程節選

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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