The phrase "aware of the variations" is correct and usable in written English.
You can use it when discussing knowledge or understanding of different forms, types, or changes in a particular context.
Example: "The researcher is aware of the variations in the data collected from different sources."
Alternatives: "conscious of the differences" or "cognizant of the changes."
"I would encourage [Lord Freud] in terms of this particular group to be aware of the variation in the way they present.
"Both women and gynaecologists should be aware of the variation that exists in genital appearance and think carefully about exploring the idea of surgery if it is not clinically necessary".
In the case being reported, the operation was performed safely because we became aware of the variation after three-dimensional computed tomography (3D-CT) preoperatively.
Moreover, continuous hemodynamic monitoring enables one to be aware of the variation of systemic oxygen delivery, and these data could be used to value critically ill patients during the weaning process.
Ecology can provide a useful framework for exploring evolving human-animal relationships from the very start of animal husbandry (e.g. Bendrey 2014), but in terms of understanding pastoral systems, we must also be aware of the possible variations in practices, such as the directions and timings of movements within the same ecological context (e.g. Behnke et al. 2011).
'Cause that's you--always acutely aware of the subtle variations within La Raza.
Be aware of the different variations on the traditional geocache.
The California plan has made it clear to the hospitals that it was both aware of the unexplained variation in prices and that it would no longer simply pay whatever a hospital charged the insurer, she said.
"Upon first seeing the mask that is held in Inverness Museum and Art Gallery, I was not aware of this variation in different copies of the mask and had considered it to be perhaps down to Charles Edward Stuart having had a crooked nose in life.
The UK's national centre for smoking cessation and training (NCSCT) is aware of this variation and has recently published on the techniques that the evidence suggests are most effective (Michie, Churchill, & West, 2011; West, Walia, Hyder, Shahab, & Michie, 2010).
