The contras arrived in Managua at a particularly unstable time.
The geography in Round Mountain has been at times very unstable.
We understand that in an unstable time repression looks like the safe course.
These are hazardous, unstable times, and I could not take the chance of anything happening to you, even here in the woods.
The first decade of the 21st Century has already proved to be a dangerous and unstable time around the world.
I think this is an unstable time for the man painting these pictures.
"There were a lot of unstable times after 9/11, but the wheels have turned."
During the most unstable times, a visit to the troops was a death warrant for the emperor.
His world continues to be at the same time unstable and unchanging.
The 1920s and early 1930s were a politically unstable time in Finland.