I'm a computer engineer.

我是电脑工程师。

Yeah, I am a computer engineer.

是啊，我是一个电脑工程师。

His ambition is to be a computer engineer.

他的志向就是成为一名计算机工程师。

So, I decided I will be a computer engineer.

所以，我决定我将成为一个电脑工程师。

I guess your father must be a computer engineer.

我猜你的父亲一定是位电脑工程师。