once and for all
一劳永逸; 一次解决所有问题
口语·表达最终决定或解决
英文释义
finally and decisively; to resolve or settle something permanently
例句
Let's settle this argument once and for all so we can move on.
典故来源
源自拉丁语“semel et semper”，强调一次性彻底解决问题。