请问What's that all about?all about 是一个词组,还是all 修饰about的?

请问What's that all about?all about 是一个词组,还是all 修饰about的? ‘THAT’S WHAT ITS ALL ABOUT‘是什么意思? That's what its all about what is that all about? all about that what is all about That's What It's All About 歌词 That's what it's all about .汉语意思是什么? Excitement: that's what learning is all about. Excitement:that's what learning is all about. That must be what it's all about.中文翻译 All about