偶然情况;巧合 If you say that something happened by happenstance, you mean that it happened because of certain circumstances, although it was not planned by anyone.
【搭配模式】:also a N
【FIELD标签】:WRITTEN 笔语
I came to live at the farm by happenstance.
我来到该农场住下纯属偶然。
Noun
1. an event that might have been arranged although it was really accidental