in a split second
在一瞬间;瞬间之间
口语·描述极短时间
英文释义
very quickly or immediately
例句
He made the decision in a split second and jumped out of the way.
典故来源
源自'split'表示分裂,比喻时间短到几乎无法分割,形容极快的瞬间。