产生ellipse的语句，
GDRAW('ELLARC', x, y, major, minor, start, end, angle);
start     numeric constant or numeric variable name; the starting angle from the major axis, in degrees, for the elliptical arc with 0 degrees beginning at the major axis.
end       numeric constant or numeric variable name; the ending angle from the major axis, in degrees, for the elliptical arc with 0 degrees at 3 o'clock.
angle     numeric constant or numeric variable name; the angle that the major axis of the elliptical arc has to 0 degrees (with 0 degrees at 3 o'clock).
这是在documentation中看到的，但一直不能解其意，请各位帮忙！