同根派生 chance upon相关词英汉例句I tumbled upon an interesting book in the library.我在圖書館偶然發現了一本有趣的書。I found him work in a cafeteria by chance.我偶然發現他在一家自助餐厛工作。I meet him in the street by chance.我在大街上偶然碰見了他。chance upon更多例句