He is an expert in paleozoology and has a deep knowledge about the ecology of dinosaurs.

He has a deep interest in paleozoology.

The tensor tympani is a muscle located in the middle ear that regulates the tension of the eardrum.

Cyanocobalamin is a type of vitamin B12.

I'm looking forward to filming a movie with my new camcorder.

I visited the Côte d’Azur during my summer vacation.

He is an expert in international relations.

This old house is the one where my grandparents lived.

Please open the door.

The leaf of this tea plant is vividly green, isn't it?