手臂肌肉的英语怎么说

手臂肌肉的英语是arm muscles。

英语单词arm来源于拉丁语的"bracchium"，意思是胳膊。肌肉（muscle）这个词来源于拉丁语的"musculus"，意思是小而结实的肉。

下面是一些使用arm muscles的例句：

He flexed his arm muscles to show off his strength. (他把臂肌收缩起来展示他的力量。)
She exercises her arm muscles by lifting weights. (她通过举重来锻炼手臂肌肉。)
He has very defined arm muscles from all the push-ups he does. (他的手臂肌肉非常结实，因为他经常做俯卧撑。)