抽丝剥茧 (抽絲剝繭) chōu sī bāo jiǎn

chōu sī bāo jiǎn set phrase to spin silk from cocoons; to make a painstaking investigation
Domain: Idiom 成语 , Subdomain: , Concept:
Notes: (CC-CEDICT '抽絲剝繭'; Guoyu '抽絲剝繭')

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