Rr
abbr. 无线电航向信标（Radio Range-beacon）；雷达测距（Radar Ranging）；无线电接受器（Radio Receptor）；连流继电器（Reverse Relay）；阻力比（Resistance Ratio）
🗣️ 情景例句
you can help me with dinner.
你就来帮我准备晚餐。
He feels awkward.
他感到困惑。
but we found that it traced its way through the trees.
没想到它到树林中继续向前延伸。