You always become my strength, thank you very much.

Earth science is a part of natural science that studies the physical and chemical structure of the earth.

Cartography is an important field of study for visually representing geographic information.

Topography is a field of study that researches terrain and geographical features.

He is majoring in geomorphology at university.

Nitrous oxide can be used for anesthesia and to boost engine power.

The ferry is crossing the river.

He is playing the role of building bridges between the two countries.

We are planning to build a bridge over this river.

She is good at playing the guitar, isn't she?