She donated several pairs of trousers to the charity to help families in need.

We used a pair of stepladders to reach the high shelves and clean the top cabinets.

In many categories, the kernel pair of a morphism captures the equivalence relation induced by its fibers.

The installation required carefully routing the twisted pairs through the conduit to prevent interference.

The researchers monitored several live pairs of birds to study parental behavior.

In many bird species, pair bonds are strengthened by shared parental care and mutual preening.

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.

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