求翻译：What on earth is that man trying to do?

求翻译：What on earth is that man trying to do? What on earth is rap? what is happiness on earth? What is the life expectancy of Earth?求翻译 翻译what on earth was it about What is the biggest animal on earth? what on earth is it anyway what is life on pluto（冥王星） like is it different from the life on the earth?怎么翻译? what on earth? WHAT ON EARTH怎么样 what on the earth? 英语翻译What on earth. what on earth was i going to do 翻译 What is the weather like in different places on earth? what is the biggest animal on the earth What is my working time on earth 英文什么意思 There is only one cover of plants on Earth翻译 what on earth are you?