1. find or meet by chance偶然發現;偶遇
I ran across the article in yesterday's newspaper. 我在昨天的報紙上偶然發現了這篇文章。
He ran across an excellent book on the subject in the library. 他在圖書館偶然找到了有關這個題目的一本極好的書。
I ran across my old classmate in the street yesterday. 昨天我在街上偶然碰到了我的老同學。
2. convey across讓…搭車穿過;運送…到對面去
He ran us across to the other side of the bay in his private launch. 他用私人汽艇送我們到海灣彼岸。
3. cross(by running)(跑著)穿過
Burning with curiosity,she ran across the fields after the dog. 她充滿了好奇心,跟在那條狗後面奔過田野。