ins and outs
Longman Dictionary of Contemporary English 5++LDOCE 5++ˌins and ˈouts noun [plural] DETAILall the exact details of a complicated situation, problem, system etc 〔复杂的局面、难题、体系等的〕详情，细节ins and outs of I don’t really know all the ins and outs of the matter. 我并不知道这件事的来龙去脉。
ˌins and ˈouts nounChineseSyllable
ins and outs
ˌins and ˈouts
noun [plural]
all the exact details of a complicated situation, problem, system etc
ins and outs of
I don’t really know all the ins and outs of the matter.
ˌins and ˈouts
noun [plural]all the exact details of a complicated situation, problem, system etc
ins and outs of