metatarsalyia

例句：

1. 1.The foot's metatarsal bones are responsible for the arch of the foot.
   足部的跖骨负责形成脚掌的弓形。
2. 2. When running, it's important to keep your feet in a straight line and not twist them.
   跑步时，保持双脚直线前进，避免扭伤。
3. 3.He had surgery on his metatarsal fracture and is recovering well.
   他因跖骨骨折接受了手术，恢复情况良好。