middle leg

例句：

1. 1.The race car needs to be balanced perfectly for the middle leg.
   赛车需要完美平衡以保持中腿。
2. 2.She was standing in front of the mirror, adjusting her middle leg.
   她站在镜子前，调整她的中腿。
3. 3.The dancer's performance was outstanding, with perfect balance and agility on both the left and right middle legs.
   舞者的表演非常出色，左腿和右腿都保持了完美的平衡和灵活性。