alternative motion

例句：

1. 1. The team decided to switch to a different form of exercise for the upcoming marathon.
   团队决定为了即将到来的马拉松更换一种不同的锻炼方式。
2. 2. During the breakout, she alternated between running and jumping rope.
   在爆发期间，她交替进行跑步和跳绳。
3. 3. The dancers often perform alternative movements that are not commonly seen in traditional ballet.
   舞者经常表演非传统芭蕾常见的替代动作。