The hyperfine structures of the atoms were carefully measured.

Lewis structures are used to represent the bonding and electron distribution in molecules.

Mathematical structures are the foundation of modern mathematics.

The park has several play structures for children to enjoy.

The power structures in the country are deeply entrenched.

The primary structures of the building are made of steel beams and concrete columns.

Proteins are composed of primary, secondary, tertiary, and quaternary structures.

Cellulose and chitin are examples of structural polysaccharides.

The structural failures of the building were caused by poor construction.

Proteins can adopt different tertiary structures depending on their amino acid sequence.