come about
发生,产生,实现；【航海】抢风调向,改变方向
How did it come about that he knew where we were?
\x09\x09\x09\x09\x09\x09他是怎么知道我们在什麽地方的呢?
Expected or required but not yet having come about.
\x09\x09\x09\x09\x09\x09期待发生的被期望或要求但仍未发生的
How did this come about?
\x09\x09\x09\x09\x09\x09这是怎么发生的?