know sth like the back of your hand Meaning in Cambridge English Dictionary
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Meaning of "know sth like the back of your hand" - English Dictionary

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know sth like the back of your hand

informal
to have very good and detailed knowledge of something: I know this area like the back of my hand.
Translations of “know sth like the back of your hand”
in Chinese (Traditional) 熟悉, 精通, 對…瞭如指掌…
in Chinese (Simplified) 熟悉, 精通…
(Definition of know sth like the back of your hand from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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