Rsr
abbr. regular sinus rhythm （心脏）正常窦性节律，规则的低节律; required supply rate 所需补给率
🗣️ 情景例句
I believe my English fluency is quite good.
我认为自己的英语相当的流利。
Man is mortal.
人生谁无死。
What a lot of smoke!
好浓的烟啊！