He is an expert in osteology and has a deep knowledge of the human skeleton.

He is a world-renowned osteologist.

He is an expert in osteology.

By regularly checking the key performance indicators, you can understand the performance of the company and devise improvement measures.

In Sanskrit phonology, retroflex sounds play an important role.

A back vowel is a sound where the back of the tongue approaches the palate.

Back vowels are vowels that are pronounced using the back of the tongue.

A coronal is a sound that is pronounced using the tip or the upper part of the tongue.

Retroflex sounds are difficult to pronounce.

Retroflex is a phonetic feature that does not exist in Japanese.