Rra
abbr. 回归再时效；余热排出系统；辐射研究协会（Radiation Research Association）；橡胶再生剂（Rubber Reclaiming Agent）
🗣️ 情景例句
My mother is a housewife and my father is retired.
我妈妈是家庭妇女，我爸爸退休了。
Just what I thought.
果然不出我所料。
Would you do me a favor?
你能帮我一个忙吗？