The limit of this plan is the lack of funds.

He is passionate about studying paleoglyphs.

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

Estrogen is a type of female hormone.

He composed a fantasia for the piano.

We took a walk in the primeval forest over the weekend.

He seems to be in a bad mood.

This word is etymologically derived from Latin.

He is excited to learn a new programming language.

He achieved the Big Three Dragons in mahjong.