He is devoted to the study of neoplasms.

There are only inanimate objects in this room.

The use of bioweapons is prohibited by international law.

The study of nekton is an important part of marine biology.

My biological clock is disrupted, and I've been having sleepless nights.

Invasive species can have a major impact on the natural environment.

He starts talking about himself at every opportunity, causing trouble for the people around him.

In the traditional Japanese number system, Nahyuta represents a very large number.

He went to the doctor complaining of objective symptoms.

He thoroughly researched the history of that nation.