第1个回答 2011-06-13
比较多的人是用：what the hell are you doing 这个较口语化，而如果是写文章，可以直接用：what are you doing？ 极少用到on earth，英语中这个“究竟”的含义多数用语气的加重表达出来
第2个回答 2011-06-13
What on earth are you doing???????本回答被提问者采纳
第3个回答 2011-06-13
What are you doing?
第4个回答 2011-06-13
what is it that you are doing?
第5个回答 2011-06-13
翻译: What on earth are you doing?