Somebody phoned while you were out. 你出去时有人打过电话。

somebody else When things go wrong, you always say it’ s somebody else’ s fault. 出错时，你总说是别人的问题。

or somebody (=or someone similar) You could always ask Marie or somebody to feed the cat while you’ re away. 或某个类似的人

When I got to be an officer, I really felt I was somebody. 当我成为军官时，我真的觉得自己是个人物了。