come about

US /kʌm əˈbaʊt/
UK /kʌm əˈbaʊt/
"come about" picture
1.

发生, 出现

to happen or occur

:
How did the accident come about?
事故是如何发生的?
It's still unclear how the changes will come about.
目前尚不清楚这些变化将如何发生