Due to the earthquake, the city declared a state of emergency.

An isotope refers to elements with the same atomic number but different numbers of neutrons.

Rare earth elements are essential materials for the manufacture of electronic devices.

Transition elements play an important role in chemical reactions.

Oxygen, which is one of the chemical elements, is necessary for us to breathe.

My house is in the middle of the town.

He loves Chinese cuisine.

I am in the middle of reading a book right now.

Mr. Naka is my best friend.

He drew a red dragon tile in Mahjong.