好东西绊倒后？
So how did he stumble upon the idea?
他怎么突然间会有这种想法？
The second is the lucky one who appears to stumble upon something by "accident".
第二类是“幸运”的人好像是偶然地正好碰到某些问题的解决方法。
You don't have to dig deep here before you stumble upon some ancient bric-a-brac.
在这里，只要稍微一挖，就可以发现一些古老的东西。
Anywhere, on any side, they might stumble upon unseen enemies ten paces from them.
到处，从四面八方都有可能碰上十步路以外看不清的敌人。
Anywhere, on any side, they might stumble upon unseen enemies ten paces from them.
到处，从四面八方都有可能碰上十步路以外看不清的敌人。
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