英语翻译1.科学家们认为世界上存有生命已有几百万年的历史了2.她一直想知道我们是怎么到达那里的3.弄清楚宇宙有多大是困难

1.Scientists think that life has existed on the earth for millions of years.
2.She was always wondering how we got there.
3.It is hard to know how big the universe is.
4.Why does nobody send messages to us from other planets?
5.No one has find life exist in the air.)

1 scientists think that there has been life for millions of years.
2 she always wanted to know how we get there.
3.Know how large the universe is difficult.
4.Why don't people from other planets to send information to us.
5.No one found in the air there is life.

1 The scientists say the world have life for millions of years of history
2 She had always wanted to know how we are to get there
3 Clear up the universe have a DuoDa is difficult
4 Why no one from another planet send us information
5 Nobody has ever found in the sky there is life