We made a plan to explore the unexplored areas of Africa.

He set off on a great adventure.

He keeps an attack dog to protect his house.

Please turn on the TV.

He asserted his droit de suite as an artist.

He is receiving treatment for pulmonary tuberculosis.

The troposphere is a part of the Earth's atmosphere, extending from the surface to about 10 kilometers.

Understanding the concept of 'Ha-line conversion sounds' is important in learning Japanese.

We are focusing on the research and development of new products.

Microscopium is one of the constellations in the southern sky.