翻译Do you know how long people live Many people live to be seventy years old.

how do you know How do you know? How do you know which machine is which请求翻译 How well do you know him?怎么翻译？ How do you know which machine is which请求翻译 how do you know me?这句话翻译一下 how are you do you know me how are you.（翻译中文） How do I know you? everyone needs friends.but do you know how to fineveryone needs friends.but do you know how to find翻译 without you I really do not know how to do hope you can understand翻译下? Why do you always take the Star Ferry ,Lo?翻译 翻译how do you do? How do you do?翻译 How well do you know your parents?How well如何翻译? How do i know what do you think?汉语翻译下 I know you do翻译 I love you,I just don't know how to propose,do you understand?翻译以下 翻译并解释一下吧； how do you know what you should do when you look at the screen