A new conveyer belt sushi shop opened up.
The sushi-go-round turned at 32 rotations per second.
Hey, still not ready? I'm too hungry. We'll go to rotating sushi without you, if you still aren't ready in three minutes.
You know that 回転 is "rotation" and you probably know what すし is (gets rendaku'd in this word to ずし). So, what is "rotation sushi?" It's rotating sushi, also known as conveyer belt sushi. Look it up if you don't know what it is.
The reading comes from 回転, so be sure to know that to know this one. Also, it's just the readings of the kanji you learned too, so shouldn't be too hard.