单词	raison d'être
释义	raison d'êtrerai‧son d'être /ˌreɪzɒn ˈdetrə $ -zoʊn-/ noun [singular] Word Origin WORD ORIGINraison d'être Origin: 1800-1900 French ‘reason of being’ the reason why something exists, why someone does something etc:  Commerce was the town’s raison d'être.
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