n. a grounder that rolls along the infield
n. a long heavy sea wave as it advances towards the shore
n. a small wheel without spokes (as on a roller skate)
n. a cylinder that revolves
n. 滚筒, 滚轴, 压路机
[化] 滚柱; 托辊
1. The roller coaster at the amusement park was thrilling.
游乐园里的过山车很刺激。
2. She used a paint roller to finish the wall quickly.
她用滚筒快速地完成了墙壁的涂漆。
3. He enjoys roller skating every Saturday with his friends.
他喜欢每个星期六和朋友们一起滑轮滑。