Old Church Slavonic is the oldest recorded language of the Slavic group.

Special relativity is one of the fundamental theories of physics.

He always keeps in mind the phrase 'If one learns without thinking, it is a waste.'

He is doing special exercises to strengthen his supraspinatus muscle.

By training the superior oblique muscle, there is a possibility that your eyesight can be improved.

He is doing special exercises to strengthen his superior rectus muscle.

The superior gemellus muscle is a part of the human body, mainly supporting movements from the waist to the knee.

Water training on the tatami is a traditional Japanese practice method.

His efforts finally brought about a spectacular result.

In linear algebra, the upper triangular matrix plays a very important role.