1. 碰巧碰上[发现]：happen in with 偶然和...碰见 | happen upon 碰巧碰上[发现] | happen on 碰巧碰上[发现]
1. happen upon
1. His very demanding Paris boss was visiting Beijing and wanted a good time and it fell upon the young Frenchman's job to make that happen.
2. The university called upon all its three affiliated hospitals to note the medical safety accident to make sure it doesn't happen again.
3. But we were lucky to happen upon a group of parents with young children following a tour guide.
4. Walking through its stalls, customers will happen upon a public dining space.
happen upon的近义词
verb
1. find unexpectedly
e.g. the archeologists chanced upon an old tomb
she struck a goldmine
The hikers finally struck the main path to the lake
Synonym: fall upon strike come upon light upon chance upon come across chance on attain discover