“肌”造句

我被要求伸展手臂，收紧胸肌。
I was required to hold out my arms and flex my pectorals.

他腹肌发达，体型完美。
He has a six-pack stomach and is extremely well-proportioned.

整个锻炼过程中，注意要紧绷腹肌。
Throughout the exercise, focus on keeping your abs tight.