fall back to

基本解释

Also, if the upgrade reacts negatively in production, you can quickly fall back to the other cell, significantly reducing recovery time.
而且，如果更新在生产中产生负面效果，您可以迅速切换到另一个单元，极大地减少恢复时间。
For functions and constants, if the current namespace does not contain that function or constant, PHP's fallback mechanism will fall back to the standard PHP function.
对于函数和常量，如果当前的名称空间不包含这个函数或常量，PHP 的后退机制会后退到标准的 PHP 函数。
As the heat diminishes, radioactive materials that have vaporized condense on the particles and fall back to Earth.
当核爆的热量减少，被蒸发放射性物质会浓缩到这些颗粒中，然后落到地面。

An order came for him to fall back and support our right.
Well, I actually think the Russian formalists can be defended against the charge that, unbeknownst to themselves, they fall back in to form-content distinctions by insisting on this variety of dualities.
但是我认为,这些形式主义者们在不自觉中，对于形式和内容的双重性,太过偏执。
耶鲁公开课 - 文学理论导论课程节选
Of course, you can imagine the thoughts of Louis XVI as they were cutting back his hair to await the fall of the guillotine on the 21st of January, 1793.
你可以想象下在1793年1月21日这天,当人们拽住路易十六的头发,等待断头台下落时他会想些什么
耶鲁公开课 - 欧洲文明课程节选

They were over achievers and, all things being equal, will fall back to earth in 2012.
FORBES: MLB 2012: Bill James's Slick, Simple Stat Picks the Baseball Season's Winners and Losers