He is an expert in paleobotany, conducting research on plants from the dinosaur era.

This biennial plant matures and blooms over the course of two years.

Phytobenthos is an important part of the marine ecosystem.

He was my student, but now he has become so proficient that it can be said 'the student has surpassed his teacher.'

Since he started his new job, he's been lively as if he were a fish back in water.

He absorbs new information like a sponge soaking up water.

The European water vole is a small mammal native to Europe.

This steam is what you see when water vapor cools down.

This building is equipped with an impermeable wall, preventing water intrusion.

The aquifer in this area provides a very abundant water source.