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?