Sometimes you raise your eyebrow because you're curious.

有时你会因为好奇而扬起眉毛。

Nod your head when you agree with something, raise your eyebrows when they say something surprising, react when they say something shocking and shake your head when you disagree with something.

当你同意某事时，点点头；当他们说一些令人惊讶的话时，抬抬眉毛；当他们说一些令人震惊的话时，做出相应反应；当你不同意某事时，摇摇头。