linux下非常好用的画图工具，划出图形很漂亮！我已经成功安装！-under linux is very easy to use drawing tools to draw the graphics are beautiful! I have successfully installed!

一款绘图工具，用于数学计算，数值计算，功能很强大的，在linux环境下应用的。-A drawing tool for mathematical calculations, numerical calculation, very powerful, in the linux environment applications.