come about

动词 come about:

1. come to pass
   同义词：happen, hap, go on, pass off, occur, pass, fall out, take place

1. How did it come about that he knew where we were?
   他是怎么知道我们在什麽地方的呢？
2. Expected or required but not yet having come about.
   期待发生的被期望或要求但仍未发生的
3. Layoffs designed to effect savings. Thus the sentence These measures may affect savings could imply that the measures may reduce savings that have already been realized, whereas These measures may effect savings implies that the measures will cause new savings to come about.
   旨在完成存款的歇业。因而句子这些措施可能影响存款暗含这些措施可能减少本以已实现的存款，而这些措施可能完成存款则暗含这些措施将导致新的存款的产生
4. How did this come about?
   这是怎么发生的?