Rfo
abbr. radio frequency oscillator 无线电频率振荡器; request for factory order 要求工厂定购
🗣️ 情景例句
Five?
5号
He who follows two hares is sure to catch neither.
追逐两只兔，两头都落空。
Oh! It looks much better now.
噢！现在似乎好看多了。