His tribe has been practicing zoolatry since ancient times.

He is studying about ancient animal worship.

She decided to try the reverse cowgirl position.

I love Shochu highball.

He is doing special exercises to strengthen his dorsal interosseus muscle.

He picked up the whip and started practicing.

Functional analysis is a branch of mathematics that studies the properties of functions in infinite-dimensional spaces.

I studied linear algebra at university.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

He repudiated the proposal.