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

The government declared a state of emergency to prevent the spread of the new coronavirus.

Isoroku is my best friend and a very kind person.

He turned fifty-six years old.

This factory strictly controls the emission of hydrogen sulphide.

I saw a Hachijō blue rock thrush on Hachijō Island.

I can't resist his fascination.

Hydrogen cyanide is a colorless liquid with a distinctive smell.

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

Hydrocarbon is a basic element of chemical reactions.