1·I chanced on this old photograph in his drawer.
我在他的抽屉里偶然发现了这张旧照片。
2·A few moments later, about three o 'clock, Courfeyrac chanced to be passing along the Rue Mouffetard in company with Bossuet.
过了一会儿，将近三点钟，古费拉克在博须埃陪同下，偶然经过穆夫达街。
3·At this point of the housekeeper's story, she chanced to glance towards the timepiece over the chimney; and was in amazement on seeing the minute hand measure half past one.
管家把故事讲到这里，偶然向烟囱上的时钟瞅了一眼：出乎她的意料，时针已指到一点半。
4·I chanced upon a couple canoeing through the most famous tunnel in Atlanta, the Krog Street tunnel.
在亚特兰大最著名的克罗格街隧道里，我偶然遇见一对划独木舟的夫妇。
5·He chanced on the root-and-branch solution to his problem.
他偶然找到了彻底解决问题的办法。