p.a.

汉语翻译

每年
【医】 髓轴的

英语解释

名词 p.a.:

an electronic amplification system used as a communication system in public areas同义词：public address system, P.A. system, PA system, PAan informal term for a father; probably derived from baby talk同义词：dad, dada, daddy, pa, papa, pappa, popa short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead同义词：protactinium, protoactinium, Pa, atomic number 91a unit of pressure equal to one newton per square meter同义词：pascal, Paa Mid-Atlantic state; one of the original 13 colonies同义词：Pennsylvania, Keystone State, PA

副词 p.a.:

by the year; every year (usually with reference to a sum of money paid or received)同义词：per annum, per year, each year, annually