We need to evaluate the cost-effectiveness of this project.

The photoelectric effect is a phenomenon where a material emits electrons after absorbing light.

By learning Pinyin, you can accurately understand the pronunciation of Chinese.

Velar sounds occur when the back of the tongue contacts the soft palate.

A lingual sound is a sound that uses the tongue when pronouncing.

Plosive sounds play an important role in linguistics.

This noise is interfering with my studies.

In phonetics, an obstruent is a sound that obstructs the airflow.

His voice echoed like a sonorant.

His Japanese pronunciation is very natural.