| 词汇 | know something back to front | 
| 释义 | know something back to front idiom  informal (UK also know something backwards); (US also know something backward(s) and forward(s))   熟谙;对…了如指掌 to have very good and detailed knowledge of something  She knows her part in the play back to front. 她熟谙自己在剧中的角色。  | 
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