This electronic device uses polyurethane-coated copper wire.

She got a run in her new tights.

She unknowingly had a run in her stockings.

The doctor took an X-ray of my leg.

In meteorology, an isotherm refers to a line on a map that indicates the same temperature.

He is only earning an income below the poverty line.

All of these points are on the same line.

The study of sound waves is an important part of acoustics.

When you cross the Arctic Circle, the temperature drops sharply.

He was on the brink of starving to death due to a lack of food.