他们使促动肌与拮抗肌相互对抗，这损害了他们的速度。

They now have the antagonistic and agonistic muscles working against each other, and this hurts their speed.

youdao

他们使促动肌与拮抗肌相互对抗，这损害了他们的速度。

They now have the antagonistic and agonistic muscles working against each other, and this hurts their speed.

youdao