I wake up at seven o'clock every day.

Let's have a barbecue with a shichirin tonight.

My grandfather is seventy years old.

Seven new students joined our class.

Seven new students joined our class.

Zhuyin fuhao is a phonetic notation used in Taiwan.

The Schläfli symbol is a part of geometry, used to represent the shape of polyhedra.

This contract prohibits interference by a third party.

He is said to have a sharp sixth sense.

He prefers to drink third-category beer.