neck and neck
不分上下；不相上下
口语·形容竞争激烈、不分胜负
英文释义
very close or even in a competition or race; with no clear leader
例句
The two runners were neck and neck all the way to the finish line.
典故来源
源自赛马术语，指两匹马并驾齐驱时脖子几乎相碰，19世纪进入日常用语。