Upconversion
上变频; 上转换; 升频转换
🗣️ 情景例句
She finished the race strongly.
她很有毅力地跑完了全程。
I ask him to tell me everything he knew.
我要求他告诉我，他所知道的每件事情。
I'm planning to start a school, so I'm trying to save as much money as possible.
我计划开办一所学校，因此我在设法尽可能地多攒钱。