be down for

基本解释

The login server may be down for maintenance.
登錄服務器，可不停機維護。
It could be down for hours, or days or longer.
可能會斷電幾小時，幾天，或更久。
blog.sina.com.cn
If you can be down for 10 or more years, exactly how much help is that?
如果你能堅持10年或更久，那又有什麽用呢？
albert-zhaoxudong.blog.163.com

A few weeks later, before the talks could be completed, Upshur joined the president and congressional leaders for a trip down the Potomac River.
And in fact in one with the girl describing her side, she several times emphasizes this need for protection, need to be free from being torn down from people around them.
事實上像一個女孩子表達的那樣，她好幾次強調了需要保護的願望，需要逃離那些打倒她的東西,逃離身邊的人們。
麻省理工公開課 - 媒躰、教育、市場課程節選
Deflection up and deflection down indicating that there was something strange that had yet to be accounted for.
發生了偏離,這就說明還有一些奇特的現象,需要我們去解釋。
麻省理工公開課 - 固態化學導論課程節選

While we're missing key hardware specs at the moment, at least potential buyers can start pondering whether they'll be down for the design revisions or not.
ENGADGET