Understanding geometric series is important for understanding mathematics.

He bought stocks at that exchange.

That theory is unscientific and has no evidence at all.

Debuccalization refers to the phenomenon in phonetics where a specific sound is pronounced outside the oral cavity.

In this chemical experiment, there is a possibility that arsine may be generated.

Arsine is a colorless, odorless, and highly toxic gas.

He injured his peroneus brevis muscle.

He gave me the cold shoulder.

The family crest of my house is Kago-me-mon.

He is known as a comic character.