So, when Claire does jumping jacks, she's using those pectorals in her chest and latissimus dorsi on her back to adduct her arms back down to her sides.

所以，当克莱尔做开合跳，胸部的胸肌和背部的背阔肌来将手向两侧内收。

When you ride a bike, I don't really know what, like, my left calf muscle is doing, or how my latissimus dorsi knows to engage when I wobble to the right.

当行车，我真的不知道我的左小腿肌肉在做什么，或者当我向右摆动我的背阔肌如何知道参与。