| 单词 | cool customer | 
| 释义 | Definition of cool customer in English:cool customernoun 
 OriginEarly 19th century; earliest use found in Walter Scott (1771–1832), poet and novelist. Definition of cool customer in US English:cool customernoun 
 OriginEarly 19th century; earliest use found in Walter Scott (1771–1832), poet and novelist.  | 
	
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