| 单词 | letter book | 
| 释义 | Definition of letter book in English:letter booknoun historical 
 OriginMid 17th century; earliest use found in Thomas Sprat (d. 1713), bishop of Rochester. Definition of letter book in US English:letter booknoun historical 
 OriginMid 17th century; earliest use found in Thomas Sprat (d. 1713), bishop of Rochester.  | 
	
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