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.
随便看	toxicological toxicologist toxicology toxic shock syndrome toxic waste toxin toy toy boy Toyota Toys ‘R’ Us trace traceable trace element tracer tracery trachea tracheotomy tracing tracing paper track track and field trackback trackball tracker tracker dog

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