noun · the heavy, wide cylinder of a road roller used to flatten or level pavement

巨大的滚轮将路面的沥青压平。

noun · a cylindrical device or rotating dial used in various mechanical applications

他拨动滚轮以调整机器的频率。

noun · a small wheel on a computer mouse that allows the user to scroll through digital content

我的鼠标滚轮最近不太灵敏。