Rpi
abbr. read progress index(ing) 有效进度指数; real progress Index(ing) 真实的进度指数; rated position identifier 确定的位置标志符（号）; revolutions per inch 每英寸走刀（主轴）转数
🗣️ 情景例句
Which part of the paper do you read first?
你会先看报纸的哪一部分？
What platform does the train leave from?
这班车从哪个站台开出呢？
Those are watermelons.
那些是西瓜。