肌肉女孩的英文怎么拼

The exercises are designed to strengthen your stomach muscles.

这些活动目的`在于增强你的腹部肌肉。

Muscles contract and relax during physical activity.

身体活动时肌肉收缩放松。

He didn't move a muscle.

他一动不动地站着。

The heart muscles contract to expel the blood.

心脏肌肉收缩以挤压出血液。

The exercise consists of stretching and contracting the leg muscles.

此项训练包括伸展和收缩腿部肌肉。