fail over
动词- To automatically switch processing from a failed component in a critical system to its live spare or backup component. · If the Web server crashes, we can fail over to the spare in less than a second.
在真实文章中学习fail over
注册免费账号后，在图书馆中把鼠标悬停在任何单词上即可看到意思，还能听朗读、收藏单词并按你的记忆安排复习，看到每本书你已经认识多少。