come about   (TTS發音)

1. （of a ship or wind）change direction轉向

    It was so stormy that the ship had to come about and head for the harbour. 風浪太大，船不得不調轉航向，朝港口駛去。

2. happen；occur發生

    How did it come about that the man is dismissed？那個人被解雇了，怎麼回事？

    The argument came about because they were talking about politics. 爭論是因為他們談論到政治而引起的。