We regret this service is temporarily unavailable.

我们很抱歉暂时不能提供这一服务。

《牛津词典》

Translation: Resource temporarily unavailable.

转换：资源暂时不可用。

youdao

This allows data to be accessed even if a server is temporarily unavailable.

即使服务器临时不可用，也可以访问数据。

youdao

But the online retailer promptly chucked it off, making the WikiLeaks sites mostly, if temporarily, unavailable.

ECONOMIST: WikiLeaks

The USAF was also unavailable for comment, but industry insiders at Aviation Week said on March 13 that the contract was temporarily suspended.

FORBES: In Dispute, Brazil's Embraer Temporarily Loses $427 Mln U.S. Air Force Gig