The old manor had several hidden pairs of stairs leading to different basements.

The charity collected dozens of pairs of spectacles to distribute to children in need.

She bought five pairs of underwear on sale and donated the extras to the shelter.

The researchers measured the pairing energies across several isotopes to understand nuclear structure.

After the trade show, the optician found several pairs of specs left on the display case.

The vintage shop on the corner had several pairs of eyeglasses displayed in the window.

The students left several pairs of glasses on the bench after practice.

The researcher released pigeon pairs into the aviary to observe their mating behavior.

In the category of groups, kernel pairs often determine equivalence relations on objects.

In covalent bonds, electron pairs are shared between atoms to create stable molecules.