來龍去脈 [ㄌㄞˊ ㄌㄨㄥˊ ㄑㄩˋ ㄇㄞˋ; lai2 long2 qu4 mai4]
lit. mountain has a connecting pulse throughout like a dragon (idiom, from fengshui); sequence of events
pedigree
cause and effects
the whys and wherefores
where sth comes from and where it goes
ins and outs
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