My left arm had gone dead.

我的左胳臂已经麻木了。

My left arm is badly bruised and I was slightly concussed.

我的左臂有严重瘀伤，而且我还有轻微的脑震荡。

As he reached over, Azrak slid a hypodermic syringe into his left arm.

他把手臂伸过来时，阿兹拉克便将皮下注射器刺进他的左臂。

His left arm is in plaster.

他的左臂打着石膏。

When I was born, the doctor explained to my mother that my left arm was missing, below the elbow.

我出生的时候，医生向我母亲解释说我左臂肘部以下是残缺的。