arm[ɑ:m]和far[fɑ:]发音一样，都含有[ɑ:]音。

She is standing in the farcorner.她正站在远处的角落里。The robber was armed with a rifle.强盗有配备步枪。The arms of this coat of mine don't fit.我这件大衣的袖子不合适。The company's research arm is very strong.该公司研究部门实力雄厚。There must be something wrong with my left arm, which is asleep.我的左臂发麻，一定出什么问题了。