In the quantum well, bound states determine the allowed energy levels of electrons.

The member states agreed to adopt a new environmental policy at the summit.

In the era of globalization, nation-states still play a crucial role in international diplomacy and security.

Ancient city states often formed alliances to defend against invaders.

Many island states rely on tourism and fishing to sustain their economies amid climate uncertainty.

The empire relied on its vassal states to supply troops and tribute during wartime.

Researchers analyzed multiple construct states to determine how the model's parameters influenced structural stability.

The map highlighted the yellow states to indicate regions at risk of drought.

In many countries, green states often lead the way in renewable energy policy and conservation efforts.

In the historical records, kin states often formed around extended families and controlled local trade routes.