He is doing a special exercise to strengthen his internal intercostal muscles.

The internal obturator muscle is part of the pelvic muscles and is mainly involved in stabilizing the hip joint.

The internal anal sphincter is a muscle that helps us control defecation.

The internal urethral sphincter plays a crucial role in controlling the flow of urine.

I am planning to go to Inner Mongolia, an autonomous region of China, next week.

In Sanskrit phonology, the concept of triphthong is important.

In Sanskrit phonology, bilabial sounds play an important role.

In Sanskrit phonology, the importance of pharyngeal sounds is emphasized.

In Sanskrit phonology, retroflex sounds play an important role.

He admitted that it is difficult to execute the plan, saying 'it is easier said than done.'