The ecosystem of zoobenthos is an important field of study in marine biology.

Masato is my best friend.

A tautology refers to a logical formula that is always true, no matter what values are substituted.

The sphericity of this object is very high.

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

Anthropozoonosis, or animal-derived infectious diseases, have the potential to spread between humans and animals.

He is truly a person who embodies the saying, 'A man of virtue will naturally attract admirers.'