We used fluorine-18 to label the glucose tracer for PET imaging studies.

The synthesis protocol required careful drying of 18-crown-6 before adding it to the potassium salt to ensure complexation.

The defenders dropped back to mark players near the 18-yard lines as the opposing team prepared to take the free kick.

The museum's exhibit on the 14-18 war drew visitors from across the country.

The striker waited just outside the 18-yard box before the perfect cross arrived.

The manager instructed the defenders to stay alert in both 18-yard boxes during set pieces.

The striker shot from just outside the 18-yard line and scored.

He hit two 180s in the match, astonishing the crowd.

The architecture of the 1880s still shapes many city skylines today.

Scholars studying industrial labor often examine records from the 1890s to understand the origins of modern workplace laws.