资料来源 : pyDict

先驱,前卫,先锋

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Avant-courier \A*vant"-cou`ri*er\, n. [F., fr. avant before +
   courrier. See {Avaunt}, and {Courier}.]
   A person dispatched before another person or company, to give
   notice of his or their approach.