my:Who are you?I have't seen anyone like you before on the earth.
JB:Oh,that's right!I am an alien from Mars,I come to earth to visit my friend.
my:A friend?Are you sure?You have a friend on the earth?
JB:Yes,we made friends with each other on a interstellar travel(星际旅行）,and he is a astronaut.
my:Oh,I know the reason.what do you think about earth?It's a good planet?
JB:It's a good planet on the whole,but there are too many people on the earth,and there too much pollution on the earth.I think the resources will be used up,right?
my:Yes,but people on the earth are trying to find more resources in the future,and I believe we will find more!
JB:I hope so.It's said that people on earth are exploreing the space,and try to find another planet like earth?
my:You have heard that?That's right,we are trying to find an other planet like earth in the space.
JB:How is it going?Have you got any progress?
my:It's a secret now!
