偶然发现短语

accidental discovery

accidental observation

chance on

fortune

happen upon

hit on

hit upon

stumble across

stumble upon

偶然: accidental; fortui ...

发现: find; discover

偶然发现的: serendipitous

by chance adv.偶然,意外地

chance on v. 偶然发现

game of chance 靠碰运气取胜的游戏

take a chance 冒险,投机

sporting chance n. 成败可能参半的机会。