“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。翻译方式有如下几种：
01
origin and development
来龙去脉
例句：
I don't know the ins and outs of the matter.
我不知道这件事的来龙去脉。
Tell us the ins and outs of the matter.
你先把事情的来龙去脉讲一遍。
02
the ins and outs
来龙去脉;前前后后
例句：
He doesn't know the ins and outs of the situation.
他对这件事的来龙去脉并不知情。
You have to know the ins and outs of your industry.
你必须知道自己行业的来龙去脉。
03
cause and effect
因果，因果关系
例句：
We should analyze the cause and effect of this event.
我们应该分析这场事变的因果。
Every thing that happens has a cause and effect.
事情发生了，就会有它的前因后果。
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