Symplectic integrators possess as a conserved quantity a Hamiltonian which is slightly perturbed from the original one.

Lorraine was slightly perturbed to find Yvonne still engrossed in her book.

Intersection multiplicity can also be realised as the number of distinct intersections that exist if the curves are perturbed slightly.

"President Curtis," she said to the slightly perturbed looking man on the screen.

He was slightly perturbed by this but eventually found it very funny because rehearsals became very convivial.

Still, she'd become slightly perturbed as every sentry throughout the night had reported more and more fires.

Slightly perturbed, New York takes a call from her manager regarding an In Touch photo shoot that he set up at her house.

'Our customs - well...' Tishchenko looked puzzled and very slightly perturbed.

I am slightly perturbed that it seems to be taking so long to get this matter addressed.

Slightly perturbed by the bolded bit.