他握住了她柔软的手臂。

His fingers closed around the soft flesh of her arm.

他猛伸手臂扶她，她才没有跌倒。

He flung out an arm to stop her from falling.

海豹的鳍肢与人类的手臂同源。

The seal's flipper is homologous with the human arm.

手臂放在两侧趴下。

Lie on your stomach with your arms by your side.

她倚靠着她儿子的手臂缓慢行走。

She walked slowly, leaning on her son's arm.

放开我的手臂——你把我弄痛了！

Leave go of my arm ─ you're hurting me!

他举起手臂试图挡开这一击。

He raised his arm to try to deflect the blow.

鲜血从他手臂上深深的伤口中涌出。

Blood poured from the deep cut on his arm.

我重重地跌了一跤，摔断了手臂。

I had a bad fall and broke my arm.

她挽着她的手臂领她横穿过繁忙的公路。

She took her arm and guided her across the busy road.

他在手臂上用绳子系了一个圈。

He tied a loop of rope around his arm.

这些动作将锻炼你的手臂和肩膀。

These movements will exercise your arms and shoulders.

他松开了绑在她手臂上的带子。

He loosed the straps that bound her arms.