miles away
心不在焉，全神贯注于其他事物
口语·表示心不在焉或走神
英文释义
deeply lost in thought or daydreaming; not mentally present or paying attention
例句
Sorry, I was miles away—what did you say?
典故来源
字面指距离很远，比喻思维远离当前场景，源于日常对话中形容走神。