rpm tells you how fast something is turning. It means revolutions per minute: how many full turns a thing makes in one minute.

rpmrpm tells you告訴你how fast something is turning某個東西轉得多快。It means意思是revolutions per minute「每分鐘轉數」how many full turns a thing makes in one minute：一樣東西一分鐘轉了幾整圈。

You see it on car engines (how hard the engine is working), on old record players (a long-play disc turns at 33 rpm; a single often at 45), and on fans, drills, and computer disks. A bigger number means faster turning.

You see it你會看到它on car engines在汽車引擎上(how hard the engine is working)（顯示引擎有多費力）on old record players在老式唱盤上(a long-play disc turns at 33 rpm; a single often at 45)（一張長時間播放的唱片轉速是33 rpm；單曲唱片常是45）and on fans, drills, and computer disks還有在風扇、電鑽和電腦硬碟上。A bigger number數字越大means faster turning，代表轉得越快。

It is a small technical label, used on screens and in manuals, not a word you chat with over tea. People say the letters, are-pee-em, or they talk about revs for an engine.

It is a small technical label這是個小小的技術用語used on screens and in manuals，出現在螢幕和說明書上not a word you chat with over tea，不是喝茶聊天時會用的字。People say the letters人們會把這幾個字母唸出來are-pee-emare-pee-emor they talk about revs for an engine，或者用revs來講引擎轉速。

Though actually, rpm is not the same as how fast a car moves down the road. The car’s speed is in kilometres per hour; rpm is only how fast the engine itself is spinning.

Though actually不過，rpm is not the same asrpm跟how fast a car moves down the road一台車在路上跑得多快並不是同一件事。The car's speed車速is in kilometres per hour是用時速公里來算；rpm is onlyrpm只是how fast the engine itself is spinning引擎本身轉得多快而已。