He believes in the fairness of justice.

He expressed a word of gratitude.

The 120-cell is one of the regular polytopes in four dimensions.

This old dictionary is a priceless treasure to me.

The police used a water cannon against the demonstrators.

This museum exhibits a collection of rare ulexite.

He, a music college student, is very good at playing the piano.

In phonetics, glottal sounds are produced by the movement of the vocal cords.

He is an expert in orthoepy, teaching pronunciation.

He is immersed in the study of Tang-Song phonetics.