scaroid

例句：

1. 1. The doctor removed the scaroid to relieve his pain.
   医生切除了滑膜以缓解他的疼痛。
2. 2.The patient's scaroid was causing him discomfort.
   患者的滑膜引起了他的不适。
3. 3. The scaroid is a thin layer of tissue that covers the joints and helps them move smoothly.
   滑膜是一层覆盖关节的薄组织，有助于它们平滑移动。