| 词汇 | know-inside-out |
| 释义 | know something inside outidiom informal C1 to know everything about a subject: 对…了如指掌 He knows the system inside out.他对该体系了如指掌。 Experts and specialists a mine of informationidiom academician artist authority boffin child prodigy doyenne lapidary Latin Americanist literati maven savant semiotician skilled smart money sports scientist whizz wonder wonderkid wunderkind |
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