(谈及可能发生或不发生的事时说)
used to say sth about an event that may or may not happen
If and when we ever meet again I hope he remembers what I did for him.倘若我们再次见面,我希望他还记得我为他做的事。
释义来自《牛津高阶英汉双解词典》第 9 版