@Kitonum 

Thank you very much for your solution. It works now. Excuse me, I have a few questions still...

1) Is there any advantage of "PolynomialSystem" comparing with "solve"?

2) What does "%[1])[]:" in your code mean?

@Carl Love 

thanks a lot

@Carl Love  Excuse me, i have one more question. In your "%6.2e" command, .2e seems to be is to digits, say, 3.00e-6, the two zero here. What does %6 mean?

@Carl Love Thank you very much.

@acer Thank you very much! It works now!

@nm Thank you very much! It seems that "continuous" is the point

@Carl Love 

on the line above the rest of the number.. 

@Carl Love 

Thanks a lot. It would be lovely if maple improves their GUI in future.

@Alejandro Jakubi 

Thank you very much! It works now.

@Alejandro Jakubi 

Thanks. I received an error message

*****

unexpected:
<?xml version="1.0" encoding="UTF-8"?>
^
> quit
memory used=0.5MB, alloc=8.3MB, time=0.09

********

It seems this is generated from GUI. Is there any simple way to run without removing "<xml..." manually

@Thomas Richard  Thanks. After adding "with(FileTools[Text]);" it works well.

@Carl Love Thank you very much! It works very well now!

@Carl Love Thank you so much!

@Carl Love 

Thank you very much!

@Markiyan Hirnyk  Thank you so much