Upconversion
上变频; 上转换; 升频转换
🗣️ 情景例句
May I have a bus map, please?
请给我一份公共汽车路线图好吗？
Sure. We are friends since primary school.
当然，我们从小学就是朋友了。
He won an election.
他在选举中获胜。