“来龙去脉”,汉语成语,本指山脉的走势和去向,现比喻一件事的前因后果(cause and effect of an event),可以翻译为“ins and outs,origin and development或whole story”等。

例句

我不知道这件事的来龙去脉

I don't know the ins and outs of the matter.

卢克从不告诉你事情的来龙去脉,但你总会弄明白是怎么回事。

Luke never tells you the whole story, but you always get the picture.

她需要一份关于事情来龙去脉的报告。

She wanted a blow-by-blow account of what happened.