Remember to tighten your stomach muscles so your body is more stable and streamlined.

记住，游泳的过程中一定要收腹，这样你的身体就会更平，更流线。

youdao

Remember to tighten your stomach muscles so your body is more stable and streamlined.

记住，游泳的过程中一定要收腹，这样你的身体就会更平，更流线。

youdao