This plastic bottle is recyclable.

We can protect the environment by recycling plastic bottles.

The utility value of this app is very high.

Let's take a look at the land use plan for this area.

Protists are single-celled organisms that live in water.

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

He is devoted to the study of neoplasms.

The use of bioweapons is prohibited by international law.

We have a responsibility to protect the biodiversity of the Earth.

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