资料来源 : pyDict

扩大的人(物),增幅器,扩大器

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

Amplifier \Am"pli*fi`er\, n.
   One who or that which amplifies.

资料来源 : WordNet®

amplifier
     n : electronic equipment that increases strength of signals
         passing through it