手臂的英文：
arm

参考例句：

He shot out his arm.
他突然伸出手臂。

The boy's freckled arms
那男孩子长了雀斑的手臂.

He shot out his arm and grabbed the ball.
他手臂一伸抓住了球。

He flung up an arm to ward off the blow.
他迅速抬起手臂挡开这一击。

Shot out her arm to prevent the Bottle from falling.
伸出她的手臂来抵挡掉下来的那个饼子

The arms and legs are integral parts of the human body ; they are integral to the human body.
手臂和腿是人体的组成部分, 是构成完整的人体必不可少的。

Christine put an arm around him, aware of his scrawny shoulders
克里丝汀用手臂扶着他，感觉到他那骨瘦如柴的肩膀。

The pitcher toed the mound, wound up and threw a fast ball.
投球手用脚趾踩踏板，挥动手臂，投出了一个快球。

I often go to a gym for a workout. Lifting weights will build arm and shoulder muscles, won't it?
我经常去体操馆锻炼。举重可以锻炼手臂和肩膀的肌肉，不是吗？

She flung her arms up
她急忙伸出手臂。

arm是什么意思：
n. 手臂；武器；袖子；权力
v. 武装；备战；准备；装备

They went off arm in arm.
他们臂挽臂地走了。

They went off arm in arm.
我们在工作中同心协办，相互配合。

Peter and Jane are walking arm in arm.
彼得和简臂挽臂地走着。

We went skipping down the street arm in arm.
我们挽着胳膊，蹦蹦跳跳地走在大街上。

The joint or bend of the arm between the forearm and the upper arm.
肘关节上臂与前臂之间的关节或胳膊弯曲处