| 单词 | reference number | 
| 释义 | Definition of reference number in English:reference numbernoun 
 OriginMid 18th century; earliest use found in Alexander Malcolm (1685–1763). Definition of reference number in US English:reference numbernoun 
 OriginMid 18th century; earliest use found in Alexander Malcolm (1685–1763).  | 
	
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