This chemical reaction occurs by the synthesis of two elements.

He is conducting an experiment to synthesize a new compound.

He welcomed the guests in the guest room.

Due to the heavy snow, the school was closed.

His birthday party was very luxurious.

His birthday party was very luxurious.

Her ring is made of real diamond.

This mountain is mainly composed of granodiorite.

He underwent a cerebrospinal fluid test.

I am studying for the Japanese Language Proficiency Test next year.