• 1. roll ball: 滚球 | 滚珠 | 高空滚球
• 2. Roll Ball Switch: 滚珠开关
• 3. roll ball for cursor positioning: 标线定位滚球

更多释义

• 1.With a roll ball rocking arm and balance tray. It is a smart design and convenient to be installed quickly.
  备有流滚珠式驻持摇臂及平衡托架，设计巧妙，安装简便，快捷。
  dict.yoduao.com
• 2.If you roll a ball up a slop, it will roll down again.
  如果你把球滚上斜坡，它还会滚下来。
  dict.yoduao.com
• 3.Some animals roll themselves into a ball for protection.
  有些动物蜷缩成一团以保护自己。
  dict.yoduao.com

©2026 网易公司