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
Butter, nice and cold and hard.
牛油 新鲜又冷又硬。
I will be going to school in September.
我将在九月份上学。
She is quite good with her hands.
她的手很巧