What on earth is love ,that makes lovers vow to stick together in life and death? Asked that what the world sentiment is,teaches the life and death straight little?

What on earth is rap? what is happiness on earth? What is the biggest animal on earth? what on earth is it anyway what on earth? WHAT ON EARTH怎么样 what on the earth? 英语翻译What on earth. 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 what on earth are you? what are there on earth We have only one Earth,so you have to love the earth; the earth is only one me,so you have to lov What is love?That binds beyond life on earth?A couple who is in love should What is the highest mountain on earth and how is it What the book is about is friendship on earth,这句话中用到那些语法? 求翻译：What on earth is that man trying to do?