translation.en: So, I was interested in these two rollers, and I actually wanted more, so I borrowed another mouse from a friend -- never returned to him -- and I now had four rollers.
translation.zh: 我对滚轮有兴趣， 但还需要多几个，所以就跟朋友借他的鼠标 一直没还他 -- 这样就有了四个滚轮。