ph.
1. How did this come about?
这事是怎么发生的？
1. 发生：clean up 彻底清扫 | come about 发生 | come across 碰见
2. 发生;(风等)改变方向：draw to a close 渐近结束 | come about 发生;(风等)改变方向 | come across (越过...而)来到
3. 发生,产生：15.know about 了解;知道 | 16.come about 发生;产生 | 17.the answer to the question 问题的答案
4. 产生;造成：bring about 导致;产生;发生 | come about 产生;造成 | check over 核对;检查
1. 产生;发生
When you say how or when something came about, you say how or when it happened.
e.g. Any possible solution to the Irish question can only come about through dialogue...
任何解决爱尔兰问题的可行方案只能通过对话产生。
e.g. That came about when we went to Glastonbury last year...
那是我们去年去格拉斯顿伯里的时候发生的事。