(each call to glTranslate is cumulative on the modelview matrix) what does it mean and how to disable this feature?

(each call to glTranslate is cumulative on the modelview matrix) what does
it mean and how to disable this feature?

Studying the book OpenGL SuperBible fram Addison-Wesley, I read:
each call to glTranslate is cumulative on the modelview matrix
what does it mean?
Does it mean that for example this code:
glTranslatef(2.0,3.0,0);
glTranslatef(4.0,5.0,0);
first moves an object that is on the origin to the point (2,3,0) and then
translates it from the (2,3,0) to (2+4,3+5,0+0) = (6,8,0) not from the
origin again?
Is this true about glScalef and glRotatef too?
for example this code:
glScalef(2.0,3.0,4.0);
glScalef(3.0,4.0,5.0);
first turn a 1x1x1 cuboid to a 2x3x4 cubic rectangle and then turns this
cubic rectangle to a 6x12x20 one?
And at last, Does this code mean that a total 75 degrees rotation around
the x-axis?
glRotatef(30.0,1,0,0);
glRotatef(45.0,1,0,0);
the most importantant: Does calling glLoadIdentity() before each call of
these functions cancels these feature?
I mean Do you think this code assures that each time translates will be
done from the origin? , scale changes will be done from the initial state?
void COpenGLControl::ZoomToFullExtent()
{
float zoom1 = (float)oglWindowWidth/(float)ImageWidth;
float zoom2 = (float)oglWindowHeight/(float)ImageHeight;
m_fZoom = min(zoom1,zoom2);
m_fZoomInverse = 1/m_fZoom;
m_fPosX = 0;
m_fPosY = 0;
OnDraw(NULL);
}
void COpenGLControl::FixedZoomIn()
{
m_fZoom = 2*m_fZoom;
m_fZoomInverse = 1/m_fZoom;
OnDraw(NULL);
}
void COpenGLControl::FixedZoomOut()
{
m_fZoom = 0.5*m_fZoom;
m_fZoomInverse = 1/m_fZoom;
OnDraw(NULL);
}
void COpenGLControl::OnMouseMove(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
if (WantToPan)
{
if (m_fLastX < 0.0f && m_fLastY < 0.0f)
{
m_fLastX = (float)point.x;
m_fLastY = (float)point.y;
}
diffX = (int)(point.x - m_fLastX);
diffY = (int)(point.y - m_fLastY);
m_fLastX = (float)point.x;
m_fLastY = (float)point.y;
if (nFlags & MK_MBUTTON)
{
m_fPosX += (float)0.2f*m_fZoomInverse*diffX;
m_fPosY += (float)0.2f*m_fZoomInverse*diffY;
}
OnDraw(NULL);
}
CWnd::OnMouseMove(nFlags, point);
}
void COpenGLControl::OnDraw(CDC *pDC)
{
// TODO: Camera controls
wglMakeCurrent(hdc,hrc);
glLoadIdentity();
gluLookAt(0,0,1,0,0,0,0,1,0);
glScalef(m_fZoom,m_fZoom,1.0);
glTranslatef(m_fPosX, m_fPosY, 0.0f);
wglMakeCurrent(NULL, NULL);
}