the ins and outs of
US /ðə ɪnz ænd aʊts əv/
UK /ðə ɪnz ænd aʊts əv/
1.
來龍去脈, 全部細節
all the details, procedures, and complexities of something
:
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She knows the ins and outs of the legal system.
她了解法律體系的來龍去脈。
•
I need to learn the ins and outs of this new software.
我需要了解這款新軟體的來龍去脈。