He achieved the Big Three Dragons in mahjong.

Protozoans are single-celled organisms.

A matrimonial quarrel is one of the factors that disturb the peace of the home.

The wildfire burned down the entire forest.

He was observing wild animals in the grassland.

The Neoproterozoic era was a very important period in the history of the Earth.

Estrogen is a type of female hormone.

The last act of today's kabuki program is the 'kiri-kyogen'.

He seems to be in a bad mood.

I forgot my power adapter, so I can't use my computer.