poster child (alsoposterboyorpostergirl)

• 1.  

  N-COUNT（可数名词） If someone is a poster child for a particular cause, characteristic, or activity, they are seen as a very good or typical example of it. 榜样 [美国英语]

  例：

  Zidane has become the poster child for a whole generation of French-born youths of North African extraction.

  齐达内已成为法国出生、北非血统的一整代青年的榜样。