His secondary role greatly contributed to the success of the team.

The term 'stereotypy' is a part of ethology, referring to the phenomenon where a specific animal repeats a specific behavior.

He has a habit of chewing loudly, so he often makes noise while eating.

Alkenes, also known as olefin hydrocarbons, play an important role in organic chemistry.

Alkynes play a very important role in organic chemistry.

In chemistry class, I learned about alkanes.

Alkenes play a very important role in organic chemistry.

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 is doing a special exercise to strengthen his sternohyoid muscle.

He is a character who decides his own fate.