Great effort is spent to obtain a perfectly stable image.
The only reason they're waiting is they want to make sure he's perfectly stable before they begin.
This system seemed perfectly stable when we left Khan here, nineteen years ago.
Jeff Covey found it "lightning fast and perfectly stable".
The machinery is in a perfectly stable state-two condition.
It will stay there if your hand is perfectly stable and nothing perturbs the equilibrium.
Gravity might be perfectly stable, but the sight was strangely disorientating.
The monowheel raced over a tracery of tracks, keeping perfectly stable.
Even then, it remained perfectly stable and level in the water, gyros whining distantly.
A perfectly stable geostationary orbit is an ideal that can only be approximated.