The phrase "stays unchanged" is correct and can be used in written English. It is typically used to indicate that something has not changed from a previous state or condition. For example, "Despite the other changes in the landscape, the lake stays unchanged."
This specific polymer has excellent flexibility and its geometry stays unchanged even at high temperature.
But Mr Netanyahu has been quick to respond that his settlement policy stays unchanged.
Like several of her peers, she has branched out into novel-writing, but her outlook stays unchanged.
My mindset stays unchanged, I will fight to get what I deserve, my best years in football".
In the body, carbon-14 in the diet gets into the DNA of new cells and stays unchanged for the life of the cell.
Myoglobin stays unchanged and red as the meat juices flow, then turns from red to gray-brown as the release of moisture ends and the meat becomes dry.
The unemployment rate stayed unchanged at 6.3%.
The keys and their version numbers stay unchanged.
Lorry traffic stayed unchanged, but market share declined.
France's jobless rate stayed unchanged at 9.9% in October.
He also thinks interest rates will stay unchanged at 0.5% until mid 2015.
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.
Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com