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

In marine biology, plankton is an important part of the marine ecosystem.

I am majoring in biochemistry at university.

Biotechnology plays a very important role in the medical field.

He is devoted to the study of neoplasms.

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

We traveled by steamship.

I went on a trip by Sekifune.

His dream is to pilot a spaceship.

The icebreaker moved forward, breaking through the thick ice.