cobby

例句：

1. 1.The cobby was small enough to fit in my pocket.
   这个小球足够小，可以放进我的口袋。
2. 2.The ball bounced off the wall and rolled under the table.
   球从墙上弹开，滚到了桌子下面。
3. 3. The sphere was so smooth that it felt like silk.
   这个球非常光滑，感觉像丝绸一样。