Pra
abbr. 涂料研究协会（Paint Research Association）；初级速率存取（Primary Rate Access）；脉冲张弛放大器（pulse relaxation amplifier）
🗣️ 情景例句
A rolling stone gathers no moss.
滚石不生苔，转业不聚财。
It's nothing.
小事情。
He is very happy to see his wife.
丈夫见到他妻子，很高兴。