The phrase "already precipitated" is correct and usable in written English.
It can be used to describe something that has already occurred or been caused, often in a scientific or metaphorical context.
Example: "The changes in the environment have already precipitated a decline in local wildlife populations."
Alternatives: "already caused" or "already triggered".
She has already precipitated pre-wedding tension by pressuring the beautiful, well-behaved Rachel to upgrade her at the last minute from bridesmaid to maid of honor.
In effect, the warming of the North American Arctic has already precipitated natural selection for birds that can assess climate change in a highly sensitive way.
They are mostly in areas remote from the sea where most of the moisture has already precipitated from the prevailing winds.
This does not, however, preclude the possibility that vascular risk factors have already precipitated white matter abnormalities in UIA patients.
Rapid action weight loss plans such as the Atkins diet, which cut out entire food groups, are already precipitating attacks.
The measurements were carried out in the absence of salt since FXR1P Nt-KH2 precipitates already at very low concentrations of either NaCl or KCl.
We can postulate that the impact may accelerate a pathological process already ongoing or precipitate a detrimental tissue response that ultimately triggers the disease in genetically susceptible individuals.
"It may have precipitated something that was already happening.
Maybe what he'd been watching on TV had led to this situation, he said, but he thought it had only precipitated something that was already under way.
There are those who are already rushing to judgment about what precipitated this event so as to advance their own pre-fixed agendas, without leaving room for the facts to emerge.
This precipitated the drafting of the 1995 constitution, which expanded the already substantial powers granted to the president by the 1993 constitution.
