Ballbearings
(ballbearing 的復(fù)數(shù)) n. 滾珠軸承
??? 情景例句
I was. But not in high school.
說的對。但高中時不好。
But she doesn't have much experience.
但她沒有太多經(jīng)驗。
For most of the earth's history they have been the only form of life on our planet.
在地球上發(fā)展的大部分進程中，細菌是地球上唯一的生命形式。