1、手臂英语:Arm,英 [ɑ?m] 美 [ɑ?rm]。
2、放开我的手臂——你把我弄痛了!Leave go of my arm ─ youre hurting me!
3、海豹的鳍肢与人类的手臂同源。The seals flipper is homologous with the human arm.